Police investigating the murder of Jim Donegan in west Belfast 16 months ago have released images of a man who may have witnessed the killing.
Mr Donegan (43), was sitting in his red Porsche Panamera outside St Mary's Christian Brothers' Grammar School on the Glen Road, waiting for his teenage son, on December 4 2018 when he was shot dead by a lone gunman who used a semi-automatic pistol.
No one has been charged with his murder.
Police have appealed to the man captured in the newly-released images to come foward.
Detective Chief Inspector Peter Montgomery said Mr Donegan had been murdered "in cold blood".
"The chilling and callous execution was carried out by a lone gunman in front of hundreds of innocent school children and their parents," he said.
"In the 16 months since this brutal killing we have made 15 arrests, however, no one has been charged.
"I am hoping the male, who we have released images of today, will contact us as we believe he may be a potential witness, and he may hold vital information about what happened."
The senior officer said any information the man has "may make all the difference".
"I would also appeal to anyone who believes they know the male pictured in these images to contact us," he said.
"I have said before I am confident the answer to finding those involved in Jim’s murder lies within the community.
"Today, I am appealing again to anyone who has information which could be significant to please, pick up the phone and tell us what you know.
"Jim was a husband, a brother, a father to two sons and a stepfather. His loved ones deserve to have answers and the community deserves to have this dangerous man who killed him sent to prison for this callous murder."
Anyone with information is asked to contact police on 101.
