Actor Ryan Grantham, known for his role in ‘Riverdale,’ was sentenced to life imprisonment for the murder of his mother. Grantham, turned himself in to the police shortly after shooting his 64-year-old mother, Barbara Waite, in the back of the head in 2020. According to Deadline, the Supreme Court in Vancouver handed down the mandatory sentence for second-degree murder, which includes a minimum of 14 years before eligibility for parole.