Paranoid pot puffer stabbed mum to death

A delusional former-soldier stabbed his mother to death because he thought she had hidden his driving licence. Criston Preddie, 29, knifed Arlene Williams, 46, then phoned the police to confess killing her. When officers arrived at Tennyson Close, Enfield, he told them his mother had been abusing him since he was a child and was determined to stop him succeeding in life. But doctors accessed Preddie and diagnosed him with delusional thoughts. Preddie claimed to have killed 100 men while…