Since 2008, 85 corpses have been fished out of waterways in and around Manchester.
The majority of them were men in their late teens and early 20s and many of the bodies were located around Canal Street, home to many of the city’s gay bars and restaurants.
The deaths have prompted speculation that a serial killer – dubbed ‘The Pusher’ by local media (after the method of the alleged murders) – is on the loose.
New documentary Manchester’s Serial Killer? by UK’s Channel 4 has investigated whether a predator is at large, lurking late at night in the city’s streets and pushing people into the canals to watch them drown.
Despite being repeatedly denied by police, speculation and rumours about the existence of a secret serial killer went wild on Twitter last January after a psychology professor said the multitude of bodies recovered from the water could not all be accidental deaths.