Nearly three months after the hit-and-run that killed 51-year-old Sidney Bolwyn in Coquitlam, his grieving family is making an emotional plea for tips that could identify the person responsible.

Bolwyn was walking on Austin Avenue near the Vancouver Golf Club on the night of January 26 when he was struck.

The driver left the scene, but a couple passersby noticed Bolwyn on the ground and called for help. Sadly, he could not be saved.

On Thursday, his daughter Amanda Romp urged the driver, or anyone with information on the accident, to come forward and help bring the family closure.

Not a day goes by that they don't think about their loss, she said.

"Our kids often get really sad that they can't see their grandpa anymore," Romp said at a tearful news conference. "We just tell them that it's OK to be sad and that it's nice that they're thinking of him."

The same day, Mounties released images of four different vehicles of interest that were taken in the area of the hit-and-run the night Bolwyn was killed.

They asked anyone who recognizes any of the vehicles to reach out and speak with investigators.

"We have an open mind about what their involvement may have been, but through painstaking forensic reconstruction of the events of that night we know they were there right around the time of the collision," said Cpl. Michael McLaughlin.

The vehicles are described a mid-sized SUV that's potentially burnt orange in colour, a grey Volkswagen Jetta, a white Mercedes GL SUV, and an unidentified smaller sedan or coupe.

Coquitlam RCMP's Coordinated Collision Investigation Team, RCMP Forensic Identification Services and the Integrated Collision Analysis and Reconstruction Service have all been working since the accident to confirm what happened, but many details remain unknown, including what exactly led up to the deadly crash.

Mounties aren’t sure where Bolywn was headed either, though his family said he was a nature-lover who walked everywhere.

"He had a good sense of humour and he was very sentimental," Romp said. "It would mean the world to my family if somebody could come forward and help us understand how this happened."

Tipsters can contact Mounties through a dedicated phone line at 778-290-5346.

With files from CTV Vancouver's Maria Weisgarber