The term "smoking gun" is a reference to an object or fact that serves as conclusive
evidence of a
crime or similar act, just short of being caught ''
in flagrante delicto''. "Smoking gun" refers to the strongest kind of
circumstantial evidence
Circumstantial evidence is evidence that relies on an inference to connect it to a conclusion of fact—such as a fingerprint at the scene of a crime. By contrast, direct evidence supports the truth of an assertion directly—i.e., without need f ...
, as opposed to
direct evidence
Direct evidence supports the truth of an assertion (in criminal law, an assertion of guilt or of innocence) directly, i.e., without an intervening inference. A witness relates what they directly experienced, usually by sight or hearing, but also p ...
. Direct evidence would include the entire action; i.e. the action of pulling the trigger, firing the gun, and the victim falling.
Phrase origin
The phrase originally came from the idea that finding a very recently fired (hence smoking) gun on the person of a suspect wanted for shooting someone would in that situation be nearly unshakable proof of having committed the crime. A variant of the phrase (as "smoking pistol") is used in the
Sherlock Holmes story, "
The Adventure of the Gloria Scott
"The Adventure of the ''Gloria Scott'' ", one of the 56 Sherlock Holmes short stories written by Sir Arthur Conan Doyle, is one of 12 stories in the cycle collected as ''The Memoirs of Sherlock Holmes''. It was first published in ''The Strand ...
" (1893).
Extended meaning
In addition to this, its meaning has evolved in uses completely unrelated to criminal activity: for example, scientific evidence that is highly suggestive in favor of a particular hypothesis is sometimes called "smoking gun evidence".
See also
*
Legal burden of proof
In a legal dispute, one party has the burden of proof to show that they are correct, while the other party had no such burden and is presumed to be correct. The burden of proof requires a party to produce evidence to establish the truth of facts ...
*
References
{{reflist
Metaphors referring to war and violence
Metaphors referring to objects
Evidence
Forensic evidence
Gun
A gun is a ranged weapon designed to use a shooting tube (gun barrel) to launch projectiles. The projectiles are typically solid, but can also be pressurized liquid (e.g. in water guns/cannons, spray guns for painting or pressure washing, p ...
English phrases