Northumbria Police's Superintendent Derek Scott told ITV Tyne Tees that Philip Whiteman, dubbed the 'Black Dog Strangler', was a "medium risk" missing person who was "insulin dependent".
Spt Scott added that there was no information he is a direct danger to the public.
The 'Black Dog Strangler' previously had the name Phillip Westwater but is now known as Philip Whiteman.
A convicted killer dubbed the 'Black Dog Strangler' has been found and returned to a secure hospital after a day on the run.
A convicted killer, who was dubbed the Black Dog Strangler, has escaped from a secure hospital, Northumbria Police said.