Tristan Roberts, an 18-year-old Welsh teen obsessed with serial killers, bludgeoned his mom to death with a sledgehammer after asking an AI bot, "What is a better weapon for murder" for him. He planned her killing for three weeks before turning to the Chinese AI bot Deepseek for murder tips. Roberts, who waited until he was an adult before buying tools used to kill his mom, Angela Shellis, blaming it on his hatred towards women and a need for revenge. He waited until his 18th birthday before buying axes, hammers and knives, the minimum age in the UK for such purchases. Roberts was sentenced to at least 22 years in prison.