Photo courtesy of NBC Montana

A 17-year-old Arlee boy has been sentenced to 80 years in the custody of the Department of Corrections after pleading guilty to stabbing his stepfather to death and critically injuring his mother last November.

District Judge Kim Christopher sentenced Nathan Butler on Thursday, September 19 for deliberate homicide for the death of 51-year-old John Fisher and a concurrent 80 years for attempted deliberate homicide for stabbing his mother, Dacia Vollin. He also received a concurrent 10-year sentence for stabbing another man in the chest.

Prosecutors said Butler told investigators he had been waiting in his room with a knife with plans to stab his mother. When Fisher responded to her calls for help, Butler said he stabbed him.

Butler will begin serving his sentence in a juvenile facility and will be eligible for parole in 20 years.