Slide 1 of 7: On Sept. 21, "Diary of a Wimpy Kid" star Ryan Grantham was sentenced to life in prison for the slaying of his mother. Prosecutors said the former actor, 24, confessed to the killing on a GoPro camera after the 2020 incident, indicating he shot her while she played piano. "I shot her in the back of the head. In the moments after, she would have known it was me," he said, according to TMZ. After murdering his mom — he pleaded guilty — prosecutors claimed that Ryan, who's also appeared on shows including "Riverdale," "iZombie" and "Supernatural," had aspirations of assassinating Canadian Prime Minister Justin Trudeau. In fact, one day after his mother's death, Ryan loaded his car with guns, ammunition, Molotov cocktails and directions to the political leader's home. CBC.ca reported that Ryan thought about carrying out a mass shooting while driving there. However, he aborted his plans and turned himself into Vancouver police.