A canine search team from Alberta has been brought in to help solve the disappearance of a B.C. teen who left home two years ago - and hasn't been seen since.

Jeff Surtel left his Mission home in the middle of the night on April 29, 2007. The last people to see the 17-year-old were neighbours who watched him ride away on his bike, a distinct blue CCM. The teen's dad, Gary Surtel, said finding the bike is the key to his disappearance.

"If we find this bike we know where to start to look."

The teen left behind his bank card and $200 cash in his bedroom.

Repeated searches of the area, including a sonar probe of the bottom of the Fraser River by Victoria Search and Rescue in 2008, have proven unsuccessful.

The Missing Children's Society brought in the Canadian Search Dog Association from Edmonton Sunday to search the banks of the Fraser River for any clues about the teen's mysterious disappearance.

"They bring us out for cold case files that they want to work on," searcher Garry Gerber told CTV News.

A sweep of the area Sunday came up empty-handed.

"Wish we could have done more," Gerber said.

The teen's disappearance has left his family in pieces, holding out hope they'll one day be reunited with their son.

"We need some closure on this," Surtel said. "We need to find out what happened."

Surtel admits there were signs something was wrong with their adolescent son before his disappearance. About a month before he left he stopped talking to his brother, whom Surtel describes as lifelong best friends.

"Jeff's grades started to fall and at that point I determined he was spending too much time playing video games and I barred him from the computer and informed him that he would be getting a summer job which he dreaded," Surtel said.

"It was shortly after that he went missing."

The search was organized and paid for by the Missing Children's Society of Canada.

"I'm a mother - it's very hard to see these families and to hear them say they are spending their weekends searching for their child," Marilyne Aalhus said.

"The one thing the society tries to do is bring some of that closure."

Gary Surtel believes his son either ran away or was hit and killed - or that he committed suicide.

"I think about him every day. It's never gonna end. I look at every kid, every bike...examine their faces," he said.

Anyone with information on Jeffrey Surtel is asked to call Mission RCMP at 604-826-7161.

With a report from CTV British Columbia's Shannon Paterson