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The Washington Navy Yard shooting occurred on September 16, 2013, when 34-year-old Aaron Alexis fatally shot 12 people and injured three others in a
mass shooting A mass shooting is a violent crime in which one or more attackers use a firearm to Gun violence, kill or injure multiple individuals in rapid succession. There is no widely accepted specific definition, and different organizations tracking su ...
at the headquarters of the
Naval Sea Systems Command The Naval Sea Systems Command (NAVSEA) is the largest of the United States Navy's United States Navy systems commands, five "systems commands," or materiel (not to be confused with "material") organizations. From a physical perspective, NAVSEA ha ...
(NAVSEA), inside the
Washington Navy Yard The Washington Navy Yard (WNY) is a ceremonial and administrative center for the United States Navy, located in the federal national capital city of Washington, D.C. (federal District of Columbia). It is the oldest shore establishment / base of ...
, in southeast Washington, D.C. The attack took place in the Navy Yard's Building 197; it began around 8:16 a.m. EDT and ended when police killed Alexis around 9:25 a.m. It is the deadliest mass shooting in Washington, D.C. history, as well as the second deadliest mass murder on a U.S. military base, behind the
2009 Fort Hood shooting On November 5, 2009, a mass shooting took place at Fort Hood (now Fort Cavazos), near Killeen, Texas, United States. Nidal Hasan, a Major (United States), U.S. Army major and psychiatrist, fatally shot 13 people and injured more than 30 other ...
.


Events


Shooting begins

Alexis left a Residence Inn Hotel he was booked into on Monday, September 16 and arrived at the Navy Yard in a rented
Toyota Prius The is a Compact car, compact/small family car, small family liftback (supermini/subcompact sedan (car), sedan until 2003) produced by Toyota. The Prius has a Hybrid vehicle drivetrain, hybrid drivetrain, combined with an internal combustion ...
at around 7:53 a.m., using a valid pass to enter the Yard. As shown on surveillance footage, he entered Building 197 at 8:08 a.m. through the main entrance, carrying a disassembled shotgun (its barrel and stock had been sawed off) in a shoulder bag. He went to the fourth floor, where he had conducted work during the prior week. There, he assembled the shotgun inside a bathroom, then emerged and crossed a hallway into the Building's 4 West area, a cubicle area near the atrium. He began shooting at 8:16 a.m. Six people were hit, five of whom died; the sixth survived wounds to the head and hand. At 8:17 a.m., the first
9-1-1 911, sometimes written , is an emergency telephone number for Argentina, Canada, the Dominican Republic, Fiji, Jordan, Mexico, Pakistan, Maldives, Palau, Panama, Iraq, the Philippines, Sint Maarten, the United States, and Uruguay, as well as ...
calls were made. By 8:20 a.m., Alexis had shot and killed eight people on the fourth floor, and he made his way to the third floor, where he fatally shot two more people within the next two minutes. He also fired at several people on at least five separate occasions, wounding one woman in the shoulder as she ran up a stairwell. A NAVSEA employee described encountering a gunman wearing all-blue clothing in a third-floor hallway and said that "he just turned and started firing." After firing several shots on the third floor, Alexis went to the first floor.


Police response

Officers began arriving at 8:23 a.m. from the D.C. Metropolitan Police Department and several other law enforcement agencies. There are many buildings on the base, however, and officers were unable to discern Building 197's location, so they asked bystanders where it was. They eventually found Building 197 after moving towards the direction from which people were fleeing. There was confusion regarding the shooting also taking place in a nearby building; in reality, a wounded victim had been evacuated from Building 197 and moved to an area near the second building for medical attention. The United States Capitol Police became embroiled in a controversy when the police union accused the agency of ordering its personnel to stand down and not respond to the shooting. While on the first floor, the shooter moved around randomly before turning around and heading towards the front entrance. He shot and killed Richard Ridgell, the security officer stationed there, and took his 9mm
Beretta M9 The Beretta M9, officially the Pistol, Semiautomatic, 9mm, M9, is the designation for the Beretta 92FS semi-automatic pistol used by the United States Armed Forces. The M9 was adopted by the United States military as their service pistol in 1 ...
pistol. Two police officers had asked Ridgell to remain at his post and try to stop the gunman if he attempted to leave the building. The shooter then fired his shotgun at a second security guard and a Navy military police officer at the first-floor atrium, missing both; the security guard fired back and the shooter fled down a hallway. Shortly afterwards, the shooter fired at two police officers and a
Naval Criminal Investigative Service The United States Naval Criminal Investigative Service (NCIS) is the primary investigative law enforcement agency of the United States Department of the Navy. Its primary function is to investigate major criminal activities involving the Nav ...
agent in another hallway before fleeing again. At 8:34 a.m., the shooter went towards the west side of the building, where he encountered two men standing at a corner of the building in an alleyway. He tried to fire at them with his shotgun but realized that he was out of ammunition; he switched to the Beretta, killing one of the men, and the other man escaped without injury. Reports indicated that the victim in the alleyway was hit by a "stray bullet". The shooter's use of the pistol in the alleyway led police to initially believe that a second gunman was involved.


Death of the shooter

After killing his final victim, Alexis moved to a cubicle area where he discarded the shotgun. At the same time, a team of officers entered Building 197, but they became confused after gunshots echoed through the atrium, leading them to believe that he was on an upper floor. They headed up to the second floor while Alexis remained on the first floor. At approximately 8:55 a.m., he went to the third floor and concealed himself inside a bank of cubicles. At 9:12 a.m., two officers and two
Naval Criminal Investigative Service The United States Naval Criminal Investigative Service (NCIS) is the primary investigative law enforcement agency of the United States Department of the Navy. Its primary function is to investigate major criminal activities involving the Nav ...
(NCIS) agents entered the cubicle area. Alexis opened fire on the two of them, hitting officer Scott Williams in both legs. Officer Emmanuel Smith and NCIS agents Brian Kelley and Ed Martin dragged Williams out of the area and alerted other officers to the shooter's presence. Williams was later taken down to the first floor for medical attention, recovering from his wounds. At 9:15 a.m., D.C. Police Emergency Response Team officer Dorian DeSantis and U.S. Park Police officers Andrew Wong and Carl Hiott entered the cubicle area and searched the individual banks. Eventually, Alexis jumped out from one of the desks and fired at DeSantis from approximately away, hitting him twice in his tactical vest, and the three officers returned fire. DeSantis was uninjured by the gunshot. At 9:25 a.m., DeSantis shot Alexis in the head, and his death was confirmed at 11:50 a.m.


Victims

There were 13 fatalities, including Alexis. He and 11 of the victims were killed at the scene, while Vishnu Pandit, a program manager in the US Navy, later died at
George Washington University Hospital The George Washington University Hospital (GWUH) is a short-stay hospital in Washington, D.C. affiliated with the George Washington University School of Medicine and Health Sciences. Since 2022, the hospital has been wholly owned and operated ...
. All the victims were civilian employees or contractors, none of them in the military. Eight others were injured, three of them from gunfire. Police officer Scott Williams and two female civilians were wounded by gunfire and were in critical condition at
Washington Hospital Center MedStar Washington Hospital Center is the largest private hospital in Washington, D.C. A member of MedStar Health, the not-for-profit Hospital Center is licensed for 926 beds. Health services in primary, secondary and tertiary care are offer ...
. Wounded victim Jennifer Bennet was shot in the shoulder, chest and thumb, and her arm is now attached to her shoulder by a metal plate and ten metal screws. *Michael Arnold, 59 *Martin Bodrog, 54 *Arthur Daniels, 51 *Sylvia Fraser, 53 *Kathleen Gaarde, 62 *John Roger Johnson, 73 *Mary Frances Knight, 51 *Frank Kohler, 50 *Vishnu Pandit, 61 *Kenneth Bernard Proctor, 46 *Gerald Read, 58 *Richard Michael Ridgell, 52


Perpetrator

Alexis was born on May 9, 1979, in the
New York City New York, often called New York City (NYC), is the most populous city in the United States, located at the southern tip of New York State on one of the world's largest natural harbors. The city comprises five boroughs, each coextensive w ...
borough of
Queens Queens is the largest by area of the Boroughs of New York City, five boroughs of New York City, coextensive with Queens County, in the U.S. state of New York (state), New York. Located near the western end of Long Island, it is bordered by the ...
. He grew up in
Brooklyn Brooklyn is a Boroughs of New York City, borough of New York City located at the westernmost end of Long Island in the New York (state), State of New York. Formerly an independent city, the borough is coextensive with Kings County, one of twelv ...
and was a resident of
Fort Worth Fort Worth is a city in the U.S. state of Texas and the county seat of Tarrant County, Texas, Tarrant County, covering nearly into Denton County, Texas, Denton, Johnson County, Texas, Johnson, Parker County, Texas, Parker, and Wise County, Te ...
, Texas. He joined the Navy in May 2007 and served in Fleet Logistics Support Squadron 46 at
Naval Air Station Joint Reserve Base Fort Worth Naval Air Station Joint Reserve Base Fort Worth (abbreviated NAS JRB Fort Worth) includes Carswell Field, a military airbase located west of the central business district of Fort Worth, in Tarrant County, Texas, United States. This military ...
. His rating was aviation electrician's mate, and he had attained the rank of
petty officer third class A Petty officer third class is a non-commissioned officer in some navies and coast guards. By country United States Petty officer third class is the fourth enlisted rank in the United States Navy, U.S. Navy and the United States Coast Guard, ...
when he was
honorably discharged A military discharge is given when a member of the armed forces is released from their obligation to serve. Each country's military has different types of discharge. They are generally based on whether the persons completed their training and the ...
from the Navy on January 31, 2011, although the Navy originally intended for him to receive a general discharge. According to a Navy official, Alexis was cited on at least eight occasions for misconduct. In 2010, he was arrested in Fort Worth for discharging a weapon within city limits. He was also arrested in 2004 in
Seattle Seattle ( ) is the most populous city in the U.S. state of Washington and in the Pacific Northwest region of North America. With a population of 780,995 in 2024, it is the 18th-most populous city in the United States. The city is the cou ...
, Washington, for malicious mischief after shooting out the tires of another man's vehicle in what he described as an anger-fueled "blackout", and for disorderly conduct in 2008 in
DeKalb County DeKalb County may refer to one of several counties in the United States, all of which were named for Baron Johann de Kalb: * DeKalb County, Alabama DeKalb County is a County (United States), county in the Northeast Alabama, northeastern part ...
, Georgia. None of his arrests led to prosecution, so there was no penalty for his actions.


Professional work

Alexis received a secret-level security clearance in March 2008 that was valid for ten years. Following the Navy Yard shooting, it was found that the federal personnel report, which led to the clearance's approval, did not mention that his 2004 arrest had involved a firearm. Alexis said on his clearance application that he had never been charged with a felony and that he had not been arrested in the last seven years; the personnel report said that he had given these answers because the 2004 charge had been dismissed. This security clearance investigation was conducted by USIS, the same contractor that had vetted
Edward Snowden Edward Joseph Snowden (born June 21, 1983) is a former National Security Agency (NSA) intelligence contractor and whistleblower who leaked classified documents revealing the existence of global surveillance programs. Born in 1983 in Elizabeth ...
. The Department of Justice has filed fraud charges against USIS in a whistleblower case filed as ''United States of America ex rel. Blake Percival vs USIS''. Alexis worked in Japan from September 2012 to January 2013 on the Navy Marine Corps Intranet network for an
HP Enterprise Services DXC Technology Company is an American multinational information technology (IT) services and consulting company headquartered in Ashburn, Virginia. History DXC Technology was founded on April 3, 2017, through a merger between Hewlett Packar ...
sub-contracting company called The Experts. After returning from Japan, he expressed frustration to a former roommate that he had not been paid properly for the work that he performed. Another roommate said that he would frequently complain about being the victim of discrimination. In July 2013, he resumed working for The Experts in the United States. Alexis was working on a bachelor's degree in aeronautics from Embry–Riddle Aeronautical University, Worldwide. He was Buddhist.


Mental health issues

After the Navy Yard shooting, the media speculated that Alexis had appeared to be suffering from
mental illness A mental disorder, also referred to as a mental illness, a mental health condition, or a psychiatric disability, is a behavioral or mental pattern that causes significant distress or impairment of personal functioning. A mental disorder is ...
. The media reported that Alexis had filed a police report in Rhode Island on August 2, 2013. He claimed to be the victim of harassment and that he was hearing voices in his head. According to an FBI official after the shooting, Alexis was under the "belief that he was being controlled or influenced by extremely low-frequency electromagnetic waves". A message later obtained by federal authorities from Alexis's personal computing devices said, "Ultra low frequency attack is what I've been subject to for the last 3 months. And to be perfectly honest, that is what has driven me to this."Greg Botelho and Joe Sterling. September 26, 2013
FBI: Navy Yard shooter 'delusional,' said 'low frequency attacks' drove him to kill
''CNN.'' Retrieved: 26 September 2013.
On August 4, 2013, naval police were called to Alexis's hotel at
Naval Station Newport Naval Station Newport (NAVSTA Newport) is a United States Navy base located in the city of Newport, Rhode Island, Newport and the town of Middletown, Rhode Island. Naval Station Newport is home to the Naval War College and the Naval Justice Scho ...
and found that he had "taken apart his bed, believing someone was hiding under it, and observed that Alexis had taped a microphone to the ceiling to record the voices of people that were following him". At the time of the incident, he was working for the contractor at the base. On August 23, Alexis showed up at a Providence, Rhode Island, emergency room complaining of
insomnia Insomnia, also known as sleeplessness, is a sleep disorder where people have difficulty sleeping. They may have difficulty falling asleep, or staying asleep for as long as desired. Insomnia is typically followed by daytime sleepiness, low ene ...
. He was prescribed 50 milligrams of
trazodone Trazodone is an antidepressant medication used to treat major depressive disorder, anxiety disorders, and insomnia. It is a phenylpiperazine compound of the serotonin antagonist and reuptake inhibitor (SARI) class. The medication is taken or ...
, a serotonin antagonist and reuptake inhibitor
antidepressant Antidepressants are a class of medications used to treat major depressive disorder, anxiety disorders, chronic pain, and addiction. Common side effects of antidepressants include Xerostomia, dry mouth, weight gain, dizziness, headaches, akathi ...
. Five days later, he sought treatment for insomnia in the emergency room of a VA medical center in Washington, D.C., where he told doctors he was not depressed and was not thinking of harming others. He was given ten more tablets of trazodone.


Prior to the shooting

At the time of the shooting, Alexis had been working for a subcontractor on a
Hewlett-Packard The Hewlett-Packard Company, commonly shortened to Hewlett-Packard ( ) or HP, was an American multinational information technology company. It was founded by Bill Hewlett and David Packard in 1939 in a one-car garage in Palo Alto, California ...
Enterprise Services contract supporting a Navy-Marine Corps (NMCI) computer network. Alexis arrived in the Washington, D.C., area on or around August 25, 2013, and stayed at various hotels to escape the voices. At the time of the massacre, he had been staying with five other civilian contractors at the Residence Inn hotel he booked into in southwest Washington, D.C., since September 7. On Saturday, September 14, two days before the massacre, Alexis visited the Sharpshooters Small Arms Range in Lorton, Virginia, south of Washington. He tested an AR-15
semiautomatic rifle A semi-automatic rifle is a type of rifle that fires a single round each time the trigger is pulled while automatically loading the next cartridge. These rifles were developed Pre-World War II, and were used throughout World War II. Rifles ...
but did not seek to buy it, a lawyer for the store said. After testing the rifle, Alexis inquired about buying a
handgun A handgun is a firearm designed to be usable with only one hand. It is distinguished from a long gun, long barreled gun (i.e., carbine, rifle, shotgun, submachine gun, or machine gun) which typically is intended to be held by both hands and br ...
at the store, but was told federal law does not allow dealers to sell such guns directly to out-of-state customers. Alexis instead purchased a
Remington Model 870 The Remington Model 870 is a Pump action shotgun, pump-action shotgun manufactured by Remington Arms, Remington Arms Company, LLC. It is widely used by the public for shooting sports, hunting and self-defense, as well as by law enforcement and mi ...
Express Tactical 12-gauge shotgun and two boxes of shells, after passing a state and federal background check. Before the shooting, Alexis sawed off the shotgun and scratched the phrases "Better off this way!", "My
ELF An elf (: elves) is a type of humanoid supernatural being in Germanic peoples, Germanic folklore. Elves appear especially in Norse mythology, North Germanic mythology, being mentioned in the Icelandic ''Poetic Edda'' and the ''Prose Edda'' ...
weapon!", "Not what yall (sic) say!", and "End to the torment!" onto the gun's receiver.


Aftermath


Reports of other shooters

On the day of the shooting, Washington Chief of Police Cathy L. Lanier initially said that police were searching for a white male wearing khaki military fatigues and a beret, who had allegedly been seen with a handgun, and a black male wearing olive military fatigues and carrying a
long gun A long gun is a category of firearms with long Gun barrel, barrels. In small arms, a ''long gun'' or longarm is generally designed to be held by both hands and braced against the shoulder, in contrast to a handgun, which can be fired being held w ...
. The white male was later identified and deemed not to be a suspect. The black male was not identified. At 7:00 p.m., officials ruled out the possibility of other shooters, but were still seeking one other person for possible involvement.


Security precautions

On September 16, many roadways and bridges were temporarily closed, and flights out of
Ronald Reagan Washington National Airport Ronald Reagan Washington National Airport is a public airport in Arlington County, Virginia, United States, from Washington, D.C. The closest airport to the nation's capital, it is one of two airports owned by the federal government and ope ...
were temporarily suspended. Eight schools were locked down, with the closest, Brent Elementary School, being locked down until 1 PM. Shortly after 3:00 p.m.,
United States Senate The United States Senate is a chamber of the Bicameralism, bicameral United States Congress; it is the upper house, with the United States House of Representatives, U.S. House of Representatives being the lower house. Together, the Senate and ...
buildings went on lock-down for about an hour "out of an abundance of caution", according to the Senate Sergeant at Arms. The
Washington Nationals The Washington Nationals are an American professional baseball team based in Washington, D.C. The Nationals compete in Major League Baseball (MLB) as a member club of the National League (NL) East Division. They play their home games at Na ...
baseball team postponed their scheduled evening game, owing to the proximity of
Nationals Park Nationals Park is a baseball stadium along the Anacostia River in the Navy Yard (Washington, D.C.), Navy Yard neighborhood of Washington, D.C. It is the ballpark of Major League Baseball's Washington Nationals. Since its completion in 2008, it wa ...
to the Navy Yard area (the facilities are close enough to share a Metro station). The Navy Yard reopened and resumed usual operations on September 19, 2013. Building 197 reopened on February 2, 2015. In October 2013, the Navy announced a repair-and-restoration contract for the building; the contract indicated that "the repairs shall be done in a manner that changes the feel, finish, appearance and layout of the space, creating a different sense of place and mitigating the psychological and emotional impacts that the facility itself could have on returning occupants". The building, renamed after Joshua Humphreys, reopened in 2015. The renovations, costing approximately $44 million, include a reflection area and new visitors' entrance, new flooring, furnishings, and an updated cafeteria.


Reactions

Shortly after news of the shooting broke, United States President
Barack Obama Barack Hussein Obama II (born August 4, 1961) is an American politician who was the 44th president of the United States from 2009 to 2017. A member of the Democratic Party, he was the first African American president in American history. O ...
pledged to ensure the perpetrators would be held responsible. Obama ordered flags at the
White House The White House is the official residence and workplace of the president of the United States. Located at 1600 Pennsylvania Avenue Northwest (Washington, D.C.), NW in Washington, D.C., it has served as the residence of every U.S. president ...
, all public buildings and all military and naval posts, stations and vessels to be flown at
half-staff Half-mast or half-staff (American English) refers to a flag flying below the summit of a ship mast, a pole on land, or a pole on a building. In many countries this is seen as a symbol of respect, mourning, distress, or, in some cases, a sal ...
until sunset on September 20. On September 17, Department of Defense officials laid a wreath at the Navy Memorial plaza in honor of the victims. In the wake of the shooting, President Obama called on Congress to revisit gun control legislation. On September 22, he attended a memorial service for the victims. The shooting sparked a discussion on the adequacy of security at U.S. military facilities. On September 18, Defense Secretary
Chuck Hagel Charles Timothy Hagel ( ; born October 4, 1946)Foreign Policy Foreign policy, also known as external policy, is the set of strategies and actions a State (polity), state employs in its interactions with other states, unions, and international entities. It encompasses a wide range of objectives, includ ...
'' magazine reported that virtually anyone with a
Common Access Card The common access card, also commonly referred to as the CAC, is the standard identification for active duty United States defense personnel. The card itself is a smart card about the size of a credit card. Defense personnel that use the CAC inc ...
(C.A.C.), provided to government contractors, civilian Defense Department employees, and soldiers, can enter many military facilities "without being patted down or made to go through a metal detector". The shooter had a
Secret Secrecy is the practice of hiding information from certain individuals or groups who do not have the "need to know", perhaps while sharing it with other individuals. That which is kept hidden is known as the secret. Secrecy is often controver ...
-level
security clearance A security clearance is a status granted to individuals allowing them access to classified information (state or organizational secrets) or to restricted areas, after completion of a thorough background check. The term "security clearance" is ...
and a C.A.C. allowing him to enter the Navy Yard. Conservative commentators including
Alex Jones Alexander Emerick Jones (born February 11, 1974) is an American Far-right politics, far-right radio host, radio show host and prominent conspiracy theorist. He hosts ''The Alex Jones Show'' from Austin, Texas. ''The Alex Jones Show'' is the lo ...
,
Ted Nugent Theodore Anthony Nugent (; born December 13, 1948) is an American guitarist, singer, songwriter, and political activist. He goes by several nicknames, including Uncle Ted, the Nuge, and Motor City Madman. Nugent initially gained fame as the le ...
, and others suggested that "gun-free zones" on military bases were to blame for the massacre. On NBC's ''
Meet the Press ''Meet the Press'' is a weekly American television Sunday morning talk show broadcast on NBC. It is the List of longest-running television shows by category, longest-running program on American television, though its format has changed since th ...
'',
National Rifle Association of America The National Rifle Association of America (NRA) is a gun rights advocacy group based in the United States. Founded in 1871 to advance rifle marksmanship, the modern NRA has become a prominent Gun politics in the United States, gun rights ...
leader
Wayne LaPierre Wayne Robert LaPierre Jr. (born November 8, 1949) is an American gun rights lobbyist who was the CEO and executive vice president of the National Rifle Association of America (NRA), a position he held between 1991 and 2024. LaPierre has faced ...
said, "when the good guys with guns got there, it stopped." In the libertarian ''Reason'' magazine, J.D. Tuccille said that on domestic U.S. military bases, most soldiers are prohibited from carrying guns, and that this made the base more vulnerable to an attack. On September 17, gun control activists and relatives of victims of shootings that occurred at
Sandy Hook Elementary School Sandy may refer to: People and fictional characters *Sandy (given name), including a list of people and fictional characters with the given name or nickname * Sandy (surname), a list of people * Sandy (Iranian music band), Iranian singer, comp ...
;
Aurora, Colorado Aurora (, ) is a List of municipalities in Colorado#Home rule municipality, home rule city located in Arapahoe County, Colorado, Arapahoe, Adams County, Colorado, Adams, and Douglas County, Colorado, Douglas List of counties in Colorado, counti ...
; and the Oak Creek, Wisconsin Sikh temple, came to Washington to protest for stricter gun control. The activists said they hoped that the Navy Yard attack's proximity to
Capitol Hill Capitol Hill is a neighborhoods in Washington, D.C., neighborhood in Washington, D.C., located in both the Northeast, Washington, D.C., Northeast and Southeast, Washington, D.C., Southeast quadrants. It is bounded by 14th Street SE & NE, F S ...
would motivate lawmakers to act to impose stricter background checks and close the gun show loophole. On September 25, 2013, Hewlett Packard fired the computer firm The Experts, which employed the shooter, over "its failure to respond appropriately" to the Washington Navy Yard shooter's mental health issues. On October 31 and December 17, 2013, the Senate's Committee on Homeland Security and Governmental Affairs held hearings examining government clearances, background checks, and physical security for federal facilities in the wake of the shootings. On February 20, 2014, a ceremony was held to honor the over 170 law enforcement officers, including 57 D.C. Metropolitan Police officers, who responded and entered the building to search for the shooter. Specifically, MPD Officers Scott Williams and Dorian DeSantis were given the Medal of Valor, U.S. Park Police Medal of Honor, and the Blue Badge Medal for their roles during the gun battle. On December 19, 2014, President Obama signed a bill authorizing the establishment of a memorial to the shooting. A remembrance wall was dedicated the following February.


See also

* 2019 Virginia Beach shooting *
Gun violence in the United States Gun violence is a term of political, economic and sociological interest referring to the tens of thousands of annual firearms-related deaths and injuries occurring in the United States. In 2016, a U.S. male aged 15–24 was 70 times more likely ...
*
Mass shootings in the United States Mass shootings are incidents involving multiple victims of Gun violence in the United States, firearm related violence. Definitions vary, with no single, broadly accepted definition. One definition is an act of public firearm violence—exclud ...
*
List of rampage killers (workplace killings) This is a list of mass or spree killers who committed attacks at the place they worked. A mass murderer is typically defined as someone who kills three or more people in one incident, with no "cooling off" period, not including themselves. A mass ...


References


External links

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