An Oregon man faces 41 months in prison after threatening to shoot nursing home workers, the U.S. District Attorney’s Office for the District of Oregon announced Tuesday.

In January 2013, Scott Alan Gorman allegedly became upset with the way nursing home workers were treating his wife, a resident with cerebral palsy, according to local reports. Gorman, now 46, threatened the workers by alluding to having guns and an underground bomb shelter, which made the staff members afraid to leave the River Park Adult Care Facility in Eugene, authorities said. The threats also prompted the nursing home to hire security guards, reported The Register-Guard.

Law enforcement officers subsequently found a Bushmaster .223-caliber rifle and four loaded 30-round magazines in Gorman’s home, according to the U.S. attorney’s office. Gorman was on probation at the time for having pulled a handgun during a dispute at a restaurant, the federal authorities say.

On Jan. 31, Gorman pleaded guilty to unlawful possession of a firearm, and U.S. District Chief Judge Ann Aiken sentenced him to 41 months in federal prison. His sentence came as part of a plea agreement, as he also faced state-level charges for allegedly assaulting an officer while he was in custody, according to The Register-Guard.