Police probing an attack on a man who died a month later have appealed for a driver who helped him to come forward.
Mark Cochrane, 37, suffered facial injuries during the alleged attack at his home on Upper Grove Place, Edinburgh on 18 February.
He was admitted to hospital on 27 February but died on 30 March.
William Pearson, 29, also from Edinburgh, has previously appeared at Edinburgh Sheriff Court charged with assault to danger of life.
He made no plea and was remanded in custody. He is next to appear on Friday.
Lothian and Borders Police said that after the incident, Mr Cochrane walked to Grove Street where a car stopped and the driver offered help.
Officers are keen to talk to the driver to work out what happened.
A police spokeswoman said: "We are seeking to trace the person who stopped to help Mr Cochrane following the incident in Upper Grove Place, as we are seeking to establish exactly what happened as a result of that incident.
"We are appealing directly to that driver to come forward as they may have information which could prove vital to the investigation.
"Anyone who was in the area at the time, or who may have seen a man with bad facial injuries in the street, should contact police as a matter of urgency."