Jesse Mollenkopf of Kalispell faces a charge of negligent homicide in the death of a Butte man who was assaulted last week.
Mollenkopf, 46 years old, is accused of assaulting 46-year-old Jason Acebedo of Butte at around 9:40 p.m. on October 12 in the parking lot of Town Pump on South Montana Street, according to Butte Sheriff Ed Lester.
Acebedo suffered a serious head injury in the attack that later required extended treatment at a hospital in Salt Lake City.
Acebedo died at the hospital on Wednesday evening.
Mollenkopf was arrested Thursday morning in Divide, Montana, and remains jailed in Butte.