Laurence Winstanley, then 23, was executed with a shot to the head before his mutilated and partly burned body - wrapped in a curtain and weighed down with a pick-axe head - was found in Baitings Dam near Littleborough in 1989.
Now detectives are revisiting the case and frogmen have searched a pond in Littleborough as part of their fresh enquiry...
He was last seen on October 2, 1988. He went for a drink at his local, The Windsor, where he received a phone call which seemed to concern him.
After leaving the pub, he went to his mothers house in Shaw, but took over an hour to complete a journey which would normally take minutes. He went back to the pub for a time but was never seen alive again.
