Thames Valley Police is releasing CCTV in connection with a sexual assault in Bletchley.
The victim was walking her dog in Queensway at about 10.30pm on Monday 23 July.
She was approached by a man who started to show interest in her dog.
The man then followed the victim to a bench near the junction of Lennox Road.
At this location the man sexually assaulted the victim by touching her inappropriately over her clothing.
Investigating officer PC Steve Jones, of the response team based at Milton Keynes police station, said: “I am appealing to the man in this CCTV to come forward, as we believe he may have vital information about the offence."
“Someone out there will know this man and I am urging them to contact police as soon as possible."
“The easiest way to contact us is by clicking here or calling 101 and quoting reference number 43180225463."
“If you don’t want to talk to police, please contact Crimestoppers by calling 0800 555 111.”