Officers are renewing an appeal to trace a man wanted in connection with an assault in Aston Clinton.
Robert Ward, who is 39, is a white man, around 5ft 9ins to 5ft 11ins tall, of stocky build with dark brown hair.
As well as Aston Clinton, he is also known to frequent central Milton Keynes, including the train station, Tring, Hertfordshire and Devizes, Wiltshire.
There has been a recent sighting, believed to be Mr Ward in Tring.
Officers want to speak to Mr Ward in connection with an assault of a 58-year-old man in Tring Hill, Aston Clinton, on 9 May this year.
The victim suffered cuts and bruising to his face, arms and body in the incident, and required hospital treatment.
PC Graham Gray, based at Aylesbury police station, said: “Despite our efforts to locate Robert Ward, we have, as yet, been unable to do so.
“I am again appealing to anybody who knows of his whereabouts to please contact Thames Valley Police online or by calling 101, quoting reference number 43220200476.
“If you see him, do not approach him, but please call 999.”