Overview: A father/son trip to the capital ended in horror as 51-year-old Lee Pomeroy fell victim to a ferocious knife attack on a commuter train. Lee was brutally stabbed 18 times in 25 seconds and died in the arms of his 14-year-old son. The attacker, who was already known to the police and mental health workers, fled the scene as British Transport Police scrambled to track him down. Once apprehended, it was up to investigators to prove that Lee’s murderer was as unprovoked, as it was ruthless.