Robert O'Ryan was taken into custody in March, 2009 after he attempted to break onto the Los Angeles set of TV show Dancing with the Stars, where Johnson was a competitor.
Authorities later found duct tape, a shotgun, a handgun, a knife and a bulletproof vest in his car, and he was charged with felony stalking, felony commercial burglary and two misdemeanour counts of carrying a loaded firearm.
He pleaded not guilty by reason of insanity, but he was convicted on all charges at L.A. Superior Court on 11 June (10).
A hearing of O'Ryan's psychological evaluation was held on Tuesday (13Jul10).
Superior Court Judge Michael E. Pastor ruled the 36 year old will be committed to Patton State Hospital, with a maximum confinement period of five years.