A suspect in a fatal hit-and-run that left a 28-year-old man dead knew the victim and had even attended the same school.
The suspect (30) was still helping gardai last night with their enquiries into the tragic death of Karl Robertson (28), who was knocked down while jogging on Hazelwood Drive in Artane at about 9.50pm on Wednesday.
Gardai are appealing for a taxi driver who picked up the suspect on Oscar Traynor Road and took him to Kilbarron Road in Coolock to come forward.
The driver did not stop after the incident and the van was burned out a short time later at Beechlawn Grove in Coolock, at the back of Parnell's GAA club.
Superintendent Gerard Donnelly from Coolock Garda Station made an appeal for information.
"Karl Robertson was out jogging and was hit by a white Renault Megane van at Hazelwood Drive," he said. "That van failed to remain at the scene."
He said a 30-year-old man presented himself at Coolock Garda Station on Thursday evening and has assisted with enquiries.
He urged anyone who was in the Hazelwood Drive area on Wednesday night between 9.45pm and 10pm and who may have witnessed the collision to contact gardai at Coolock.
"In particular, I am most anxious to contact a man in his 20s who may not be from Ireland but who interacted with some of the people here who were assisting Karl at the scene," he said. "I am also aware that there may have been a couple, a man and a woman, out walking at Hazelwood Drive at the time of the collision and again I would appeal for them to come forward."
He said he was also anxious to trace the taxi driver who picked up a man in his early 30s on Oscar Traynor Road shortly after 10pm on Wednesday night and took his fare to the Kilbarron Avenue area of Coolock.
Supt Donnelly said he was satisfied that the man who presented himself and was questioned was the driver of the van and that the vehicle was not stolen.
Gardai are treating the accident as a hit-and-run.
Meanwhile, about 50 of Karl's work colleagues held a candlelight vigil at the site of the tragedy last night.
Dunnes Stores' staff paid tribute to their friend by sharing memories and playing some of Karl's favourite music.
His aunt and work colleague, Margaret Barrett, told the Herald her nephew was the "kindest man" in the world.
"He had a heart of gold and was just such a beautiful person," she said.
"I'm so blessed that he was in my life and I'll never forget him.
"He always went out of his way for everyone and was a very quiet, respectful young man."
Karl's sister Niamh, who also attended the vigil, pleaded for the taxi driver to come forward to help police.
"I beg him to go to the garda because he could help them so much in their investigation," she said.
"I can't understand why anyone could do this."
The family of a man who is in a critical condition after being knocked down in a hit and run on the northside of Dublin city have appealed for the driver of the vehicle to hand themselves in to gardai.