POLSON, Mont. -

A 17-year-old from Arlee 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 Adam Butler on Thursday for deliberate homicide the death of 51-year-old John Fisher and a concurrent 80 years for attempted deliberate homicide for stabbing his mother, Dacia Vollin. He received a concurrent 10-year sentence stabbing another man in the chest.
Prosecutors say 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.

"You took him from us Nate," Fisher's sister said in court. "I washed the blood off of his hands and off his face. And I saw the viciousness of the wounds."

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