Stillwater prison officials say an inmate killed a corrections officer Wednesday afternoon. Officer Joseph Gomm was reportedly attacked with a hammer, in an industry building where offenders take welding and carpentry classes. The 45-year-old from Blaine was rushed to the hospital where he later died. State Corrections Commissioner Tom Roy believes this is the first time in the prison’s history a corrections officer has been lost to violence. “We are visiting emotions that we have not visited before.” Roy says offender-on-offender assaults occur regularly in Minnesota’s corrections system, as do assaults on staff “but really this loss of Officer Gomm is at a level that we have not seen before.” After the attack, the inmate involved was transferred to Oak Park Heights, the state’s only Level Five maximum-security prison. There are reports that the inmate who attacked Officer Gomm is Edward Muhammad Johnson, who is serving a sentence for the 2002 murder of his roommate.