A Michigan man who blames the FBI for the murder of his father and thousands of others was arrested today and accused of leaving a bomb in a tool bag at the Detroit federal building last month.

Federal building security officers kept the black satchel for three weeks before discovering the explosive device inside.

Gary Mikulich, 42, of Kingsford, in the Upper Peninsula, is to appear Friday morning in federal court in Marquette, Mich., The Detroit News says. If convicted, he could face 5 to 10 years in prison.

Mikulich, an engineer graduate from Michigan Technological University, "has long complained of the FBI generally, and FBI Detroit in particular," the FBI said in a news release. "Specifically, Mikulich frequently complains to local law enforcement officers about the FBI's 'card system.' This 'card system' is responsible, according to Mikulich's complaints to local law enforcement officers, for the murder of Mikulich's father and thousands of other people."