The Stillwater prison inmate accused of killing a corrections officer had a "significant" discipline record but eventually had earned a spot working in the prison's industrial building, Minnesota Department of Corrections officials said Thursday.
And it was there where he allegedly killed officer Joseph Gomm on Wednesday afternoon.
The prison remained locked down Thursday out of an "abundance of caution," DOC Commissioner Tom Roy said at a news conference. The situation is being assessed daily, but so far prison officials haven't seen any "accelerated behaviors," he said.
After the attack, Edward Muhammad Johnson, 42, the inmate accused of killing Gomm, was moved to the more restrictive maximum-security prison in Oak Park Heights.
Johnson has a long history of violence. He is serving a 29-year term for fatally stabbing his 22-year-old roommate, Brooke Thompson, while her 5-year-old daughter was nearby in their Bloomington home in 2002.
Late that year, while in the Hennepin County jail during his trial, Johnson assaulted a deputy, authorities say. He ignored orders to stay out of a certain area of the jail and punched the deputy in the eye, leaving him with a cut, according to the charges. He pleaded guilty to fourth-degree assault and was given a 10-month term.
A few months later, Johnson pleaded guilty to killing Thompson. In March 2003, he began serving his time at Stillwater for that crime.
Since then, Johnson has racked up 1,695 days in segregation for numerous offenses, including 540 days in connection with a prison fight in July 2004, authorities said. During that fight, he was stabbed in the right eye by a fellow inmate with whom he'd had a long-running dispute. The attack cost Johnson his eye.