New Sky Crime documentary The Mystery of Suzy Lamplugh re-examines case
Fulham estate agent Suzy, 25, disappeared in July 1986 and declared dead in 94
Reveals witness who claims to have seen John Cannan dump luggage in Brentford canal three days after she went missing went to police three times
Friend of witness said she received phone call from police officer a few months ago to say they re not pursuing it anymore and claims she felt dismissed
Former head of investigation Jim Dickie says he d move Heaven and Earth to search the waterway for the estate agent s body if he was still in charge