CCTV witness appeal after death of Mark Gallagher
CCTV images have been released of a man police believe could provide information about a death in West Dunbartonshire.
Mark Gallagher, 37, was found seriously injured at the Argyle Park football pavilion in Alexandria on Sunday 15 January and later died.
A 49-year-old man has appeared in court charged with murder.
Officers from Strathclyde Police stressed the person they want to trace is a potential key witness.
The CCTV images are of a man at the Co-op in Argyll Street, Alexandria, at about 16:00 on 15 January.
Det Insp Graham Cordner, from Strathclyde Police, said: "I believe that this person who is seen in the area, is a key witness and could have information that is vital to this investigation."
The man was wearing a dark-coloured woollen style hat, with a stripe and logo, a dark-coloured waist-length jacket, blue denims and either dark blue or black training shoes with white markings.
Det Insp Cordner asked anyone with information to come forward to police as a matter of urgency.
After he was found, Mr Gallagher was taken to the Royal Alexandra Hospital in Paisley where he died.
Colin McFarlane, from Alexandria, appeared in court last week charged with murder.
Mr McFarlane made no plea or declaration at Dumbarton Sheriff Court and was remanded in custody.
He is due to return to court later this month.