Police have released a grainy surveillance video that shows the SUV thought to have run down a postal worker in the street last week.

They hope it will lead them to driver, and ultimately answer questions about what really happened that day.

"At this point, we've investigated as far as we can go,” said Const. Julie Webber. “We haven't received any tips from the public.

"No one has come forward. Obviously, someone out there knows something about what happened."

Postal worker Greg Mady is slowly recovering from injuries incurred in a hit and run in December. (CBC News) Greg Mady is recovering in hospital from two broken legs. He suffered three compound fractures in his right leg and one in his left after he was hit by an SUV as he stepped out of his Canada Post van to begin his delivery route near 127th Avenue and 125th Street.

The video does not clearly show Mady being hit. It does show the SUV turn a corner afterward and slow down for a moment, before driving away.

"I believe it's possible that the suspect ... might have been thinking about pulling over and stopping, then obviously changed their mind and continued on," Webber said.

The footage also shows someone who appears to run to the corner to get a look at the SUV as it drives away, then walks back to where Mady lies on the ground.

The SUV is believed to be a dark, older model Jeep Grand Cherokee ​with a roof rack and tinted windows.

Driver is probably regretting it, says Mady

Mady is likely to spend another week recovering in hospital.

“I know that I’m lucky,” he said. “Because I didn’t suffer any brain damage, or spinal damage. But some people are lucky enough not to have anything happen to them at all. So, I feel like I’m kind of in the middle lucky zone. Not necessarily the luckiest, but not the worst luck.”

He said he wants the driver to come forward take responsibility. He’s glad the video has been released, but also concerned.

“I’m worried that the negative attention toward the person who did this might prevent them from actually fessing up. What I don’t want is a lynch mob going after this guy, or girl, for being a terrible person. Because very likely they just made a mistake, and are probably regretting it.”

Mady was following safety guidelines when he was hit, according to Canada Post.

"We're looking at our training right now to see if there's anything we can add ... and just making sense of where we can make it safer," said Canada Post Superintendent Sandra Dovey.