Thames Valley Police is appealing for a specific witness in connection with an ongoing murder investigation in Aylesbury.
It relates to the enquiry into the death of Clive Porter, 63, who died after an incident on the Grand Union Canal near Broughton in Aylesbury at around 12.20pm on Monday 26 April.
They have released a photo that was taken 10 minutes before the incident, and shows someone who appears to be walking a dog along the towpath, near to Broughton Crossing, located very near to the car park on Broughton Lane.
The person can be seen in the top right of the photo, near to the bridge.
If you recognise this image to be you, or someone you may know, the Police ask that you contact them, as they believe that this person may have information relating to this investigation that could be very important.
Anyone who can help is asked to call 101, or report online. Please quote reference 845 of 26/4 while doing so. If you prefer to remain anonymous, you can do this by calling independent charity Crimestoppers on 0800 555 111. You will have 100% anonymity while reporting this way.