Have you seen a haunting figure that sent shivers down your spine, or photographed something that wasn't really there?
In fact, it has led to decades of heartbreak for the families who lost loved ones, never able to bury their dead.
The ripple effect of the murders continues along the generations, still blighting lives with its backwash of depression and addiction.
Philomena Mc Kee, the younger sister of Kevin Mc Kee, who disappeared with Seamus Wright in 1972 from West Belfast told me her mother lost her mind with grief.
“They should have taken my mother that same day,” she says. Even now, it’s like you’re stuck and you can’t move forward.
“Did they let him die before they put him in the hole? ” Several bodies have already been found in Co Monaghan, including Charles Armstrong, a father-of-five who disappeared on his way to Mass in 1981 in Crosmaglen, South Armagh.