Grantham pleaded guilty to second-degree murder in March 2022 after shooting his mother Barbara Anne Waite in the head on March 31, 2020, while she played the piano.
Disturbing details of the case came to light during court hearings in June, including CBC reports that Grantham rehearsed the killing of his mother and took videos, confessing to the murder and showing his mother’s dead body on camera.
CBC reports that after Grantham shot his mother at their Squamish, British Columbia, home, he packed his car with guns, ammunition, 12 Molotov cocktails, camping gear, and directions to Canadian Prime Minister Justin Trudeau’s Rideau Cottage home in Ottawa.
The outlet adds that Grantham decided against driving to Trudeau’s home, but instead considered committing acts of violence at his former college, Simon Fraser University in Vancouver. Ultimately, he decided against it, and that’s when he turned himself in to Vancouver authorities.
E! news says on the final day of court hearings in June, Ryan made a statement, saying, "It hurts me to think about how badly I've wasted my life. In the face of something so horrible, saying sorry seems so pointless. But from every fiber of my being, I am sorry."
Grantham appeared in small roles in 2010's “Diary of a Wimpy Kid” as well as in the 2009 film “The Imaginarium of Doctor Parnassus.” He also acted on CW shows, including “Supernatural” (2008 & 2015), “iZombie” (2015), and a 2019 episode of “Riverdale.”