A man who worked as senior master sergeant in the United States Air Force has pleaded guilty to the possession of unregistered destructive devices found at his Cloquet home.
During a search warrant carried out on March 16, 2016, investigators discovered 33 military explosive grenades at the home of Scott Castleman, who was also the superintendent of the 934th Civil Engineering Squadron Explosive Ordnance Disposal in Minneapolis.
The grenades seized were part of a larger number of grenades intended to be destroyed. Castleman and members of the Civil Engineering Squadron Explosive Ordnance Disposal were asked to destroy the grenades.
But Castleman took 33 grenades to his home without authorization, according to a court document, violating the National Firearms Registration and Transfer Record, which carries a maximum penalty of 10 years in prison.