In September 1995, 65 year old convicted paedophile James Stewart was working as a Big Issue seller in Leicester Square.
Stewart lured a 15 year old boy (who had run away from his home in Essex that morning) to his house in Kilburn Lane, where he plied the boy with beer and whiskey, and subjected him to a brutal sex attack.
This is the same MO Dennis Nilsen used with young boys in the 80s, and what I suspect happened to Andrew. I suspect the killer or killers would have been caught if CCTV hadn't been ignored by police and wiped.