Kern was found guilty of reckless endangerment in the shooting of Raymond Gray, a police trainee. Gray was critically injured in the shooting. The incident occurred at the Rosewood Center in Owings Mills, Maryland.
Kern testified at trial that he thought he was holding his simunitions training pistol that fires paintball-like cartridges when he pointed the gun at Gray and pulled the trigger. "I realized it was not my simunitions weapon immediately," he said.
Prosecutors argued that Kern broke policy by bringing his gun to the training and that he had an "unhealthy attachment" to his gun, had pulled it by mistake before the shooting and was reluctant to give it up afterward.
Gray, who was shot in the head, lost sight in one eye and was hospitalized for months before moving to a rehabilitation center.
Kern was also sentenced to two years of probation and will have to undergo psychiatric counseling.