Madison Police arrested a man Sunday morning after he allegedly threatened to kill security staff at St. Mary's Hospital.

According to police, the suspect initially came to the hospital with a family member who needed medical attention. Shortly before 1:00 a.m. Sunday, security staff escorted him outside after he began to yell and swear.

Witnesses say the man, who police identify as 22-year-old Bo Penman, threatened to “beat up” security personnel. Police were called and Penman was ticketed for disorderly conduct and trespass. An officer game him a ride home.

Around 2:20 a.m. Penman returned to the hospital and allegedly threatened security again, saying he was going to get a shotgun. Police were called again, and officers began to do extra patrols around the hospital.

About an hour later, police and hospital staff found a suspicious vehicle driving with its headlights off. It was stopped on a street just outside of the hospital.

Police arrested Penman. Officers say he had shotgun shells in his pockets and a shotgun in the trunk of the car.

Penman faces two counts of disorderly conduct and two counts of trespass to a medical facility.