Sope Peters was last seen between the hours of 23.15 and 00.15 on Tuesday 29th October by the entrance to Klute.
Peters is about 5’7, American and left the house wearing green trousers and a black t-shirt.
Police are urging anyone who thinks they saw him around this time or have since, to please call 07910813522 immediately to be put in contact with the relevant officers.
Helicopters were present around Durham this morning conducting a search and Police are treating this as a serious matter.
Photograph: Sope Peters