Thames Valley Police is releasing an E-Fit image following a robbery which occurred in Milton Keynes.
The incident took place on the Redway behind McColls in Highgrove Hill, Great Holm on Friday, 20 November at about 8.55pm.
The victim, a 33-year-old man, was walking his dog when he was approached by a man whom he did not know.
The offender pulled a knife from his jeans pocket and demanded property from the victim.
The victim refused, and the offender then left the scene empty-handed in the direction of Crownhill.
The victim was not injured during the incident.
The offender is white, aged between 35 and 43 and about 5ft8ins tall. He is described as having patchy facial hair, fat lips and with a medium build.
The offender was wearing a dirty grey hooded top, navy jeans and a dark coloured baseball cap. He is described as having an Eastern European accent.
Investigating officer, Detective Constable Sebastian Kuzoe, based at Milton Keynes police station, said: “I would like to speak to the man in this image, or anyone who recognises him.
“If you know who he is, or have any information about him, or about this incident, please call Thames Valley Police on 101, quoting reference number 43200386884.”
Alternatively, you can call Crimestoppers anonymously on 0800 555 111, or make a report online.
© MKFM News 2020