Tullius Crispinus was

Praetorian Prefect The praetorian prefect (; ) was a high office in the Roman Empire. Originating as the commander of the Praetorian Guard, the office gradually acquired extensive legal and administrative functions, with its holders becoming the Emperor's chief ai ...

with

Titus Flavius Genialis Titus Flavius Genialis (Latin: ''T. Flavius Genialis'') was Praetorian prefect with Tullius Crispinus in 193 AD. He was appointed by Didius Julianus, who had just bought the throne from the Guard. Even in the face of Julianus' rapidly deteriorating ...

in 193 AD. He was appointed by

Didius Julianus Marcus Didius Julianus (; 29 January 133 – 2 June 193) was Roman emperor from March to June 193, during the Year of the Five Emperors. Julianus had a promising political career, governing several provinces, including Dalmatia (Roman province) ...

, who had just bought the throne from the guard. Didius Julianus had planned to name

Septimius Severus Lucius Septimius Severus (; ; 11 April 145 – 4 February 211) was Roman emperor from 193 to 211. He was born in Leptis Magna (present-day Al-Khums, Libya) in the Roman province of Africa. As a young man he advanced through cursus honorum, the ...

his co-emperor and sent Crispinus to deliver the offer. Severus killed him and thus declined the offer.

Sources

* ''

Historia Augusta The ''Historia Augusta'' (English: ''Augustan History'') is a late Roman collection of biographies, written in Latin, of the Roman emperors, their junior colleagues, Caesar (title), designated heirs and Roman usurper, usurpers from 117 to 284. S ...

'', ''Life of Didius Julianus'' * Anthony R. Birley, ''Septimius Severus: The African Emperor'', p. 99 * Anthony R. Birley, ''Lives of the Later Caesars'', pp. 197-198 2nd-century Romans Praetorian prefects Tullii {{AncientRome-bio-stub