31-year-old Gary Campbell, from the Creggan Estate, was last seen in the early hours of Saturday morning in the Creggan Street area.
He was wearing a yellow and white checked shirt, black jacket and jeans when last seen.
Gary was taken off the Craigavon Bridge at around 11pm on Friday by police and was brought home. But he has been missing since Saturday morning.
His uncle, Daniel spoke on todays Shaun Doherty Show: