A man indecently exposed himself on the Ise Lodge estate in Kettering.
Police were called after the disturbing incident at about 2.30pm on Sunday, July 14.
A man walking a Staffordshire bull terrier type dog in St Stephen’s Road, close to the Budgens store, indecently exposed himself to a woman in a passing car.
The man had entered St Stephen’s Road from St Francis’ Close. A few minutes earlier he was seen in Deeble Road.
A police spokesman said: "He is described as white, aged in his 50s, of stocky build and bald.
"He was wearing a navy blue zipped hoody, with navy jogging shorts and trainers."
Anyone who saw the incident, or recognises the description of the man, should call Northamptonshire Police on 101.