Augustus Standingrock pleaded guilty Friday to fatally stabbing two people in Missoula, Montana, in 2017. The plea deal recommends a life sentence in which he is eligible for parole. Standingrock and Tiffanie Pierce each faced two counts of deliberate homicide after the bodies of 15-year-old Marilyn Pickett and 24-year-old Jackson Wiles were found dismembered and partially dissolved in tubs filled with acid at Pierce’s home in August 2017.
He pleaded guilty to deliberate homicide and accountability to deliberate homicide Friday in Missoula County District Court and agreed to testify against Pierce. The two were scheduled to stand trial separately for the murders.