The man who was fatally shot Sunday by Kent police following a manhunt, shootout and propane-tank explosion was identified Tuesday by the King County Medical Examiner’s Office as 28-year-old Richard Duncalf.

Duncalf died from multiple gunshot wounds to the head, back, chest and extremities, according to death investigators.

Five Kent police officers were placed on paid administrative leave following the shooting, a police spokeswoman said Monday. The officers fatally shot the man after he opened fire on them, and amid the gunfire, multiple gunshots hit a propane tank, which exploded, the spokeswoman said.

Court records show Duncalf, who also went by “Trevor,” one of his middle names, had a long and violent criminal history:

At 16, Duncalf was convicted of second-degree assault for beating a 13-year-old boy over a stolen bicycle in Woodinville. The younger boy suffered life-threatening injuries and had to have his spleen removed as a result of the attack, court records say.

In 2003, Duncalf, then 17, and a friend became involved in a heated argument with an 18-year-old man over a bottle of rum at a West Seattle house party, court records show. Duncalf pistol-whipped the 18-year-old, fracturing his skull, the records say. Duncalf, who was affiliated with a West Seattle gang, was convicted of second-degree assault and intimidating a witness for threatening to kill witnesses and their families if they talked to police.

At age 20, Duncalf attacked his roommate while the roommate was having sex with a woman who Duncalf mistakenly thought was Duncalf’s girlfriend, according to court records. Duncalf, who was a “strength trainer” and could bench press 280 pounds, beat his roommate unconscious, causing eight fractures to the man’s face and body, the records say.

Convicted in 2008 of second-degree assault, Duncalf was given an exceptional sentence of  just over 8 years in prison.