Riverdale actor Ryan Grantham has pleaded guilty to killing his mother Barbara Waite in 2020..

Grantham, 24, shot his mother in the back of the head while she was playing the piano on March 31, 2020.. The murder took place in their townhouse in Squamish.. In court, the artist told how exactly he committed the murder and even showed a video filmed a few hours after the murder, in which he confesses to the murder and shows the dead body of his mother, writes CBS.

The next day, Grantham packed three pistols, ammunition, 12 Molotov cocktails, camping supplies and a map with directions to Rideau Cottage in Ottawa in his car and drove east with the intention of assassinating Prime Minister Justin Trudeau..

As noted by the forensic psychiatrist, Grantham reputedly went through an intense period of clinical depression in the months before the murder, while maintaining the appearance of a normally functioning person..

He also felt the urge to commit violence and suicide, along with growing feelings of self-hatred and guilt towards his mother, potentially learning that he had stopped attending classes at Simon Fraser University.. Both reports stated that he had a cannabis use disorder..

Reports say Grantham decided to kill his mother to deprive her of the violence he was about to commit.. The forensic psychiatrist added that while it may seem like an altruistic motive, Waite's murder was a deeply selfish act..

" It's something other than altruism,"

Second-degree murder carries an automatic life sentence. Prosecutors want 17 to 18 years in prison. The hearing is expected to end after the defense.

Note that Grantham has been acting in films and television since the age of nine.. Among his famous roles are playing in the television series Riverdale, Supernatural, I am a Zombie, as well as the films Diary of a Wimpy Kid and The Imaginarium of Doctor Parnassus..