Police are asking for the public's help to find a missing man who they describe as "high risk".
59 year old Paul Winterbottom was last seen in Flixton in Greater Manchester on Saturday.
He was wearing glasses and black tracksuit bottoms with a white stripe, as well as a cream hoody.
Detectives are hunting a tattooed robber who held-up a shop in Flixton.
The man jumped over the counter at the One Stop Store on Moorside Road, and threatened staff with a knife.
After forcing them to open the till, he fled with a "quantity of cash".
Officers say the robber has a distinctive black tattoo containing "possible foreign characters" on his left arm.
The robbery happened on 9 March. Police released the footage today.