A Winnipeg man is using his spare time behind the wheel to look for people who may be driving under the influence.

It’s Les Yasinsky’s weekend mission.

Around 9:30 p.m. almost every Friday and Saturday night, he packs up a few things, and heads to local bars and beer vendors.

But this Winnipeg man isn't going for a drink.

“I'll sit there and I will watch and see people going in and out (of the bar), all night long,” said Yasinsky.

He spends his night out in the parking lot, watching for drunk drivers.

The cause is close to his heart. On November 10, 2010, a man killed Yasinsky's 22-year-old son, Brett, in a crash on McPhillips at Grassmere Road.

“He was five times over the legal limit. He was driving erratically, high speed, with no headlights on. He T-boned my son and my son lost his life,” said Yasinsky. “Nobody wants to get that phone call that they've lost a loved one, and if I can change that in any way, great.”

Yasinsky says the man who killed his son pleaded guilty and was sentenced to 2.5 years in jail.

Now, the 51-year-old father puts a camera on his dashboard each week to record how people are driving.

“I watch those that are stumbling, one step forward, two step back, can't get their key in, having trouble getting in, I think they might have had too much to drink. I'll follow them,” said Yasinsky.

He says if the driver starts swerving, missing stop signs and stop lights, or driving erratically, he calls 911.

“I'll let them know where I am, where I’m following the vehicle,” said Yasinsky, “I’ll give them a description of the vehicle, a plate number. When they come, I let them do what they do.”

Yasinsky never approaches a driver he thinks might be drunk.

He hands over the footage if police ask for it and otherwise deletes the video.

“I'm not out there as a vigilante, I’m out there as eyes and ears for the police,” said Yasinsky.

He hopes others will join in his efforts.

He’s started a campaign called "D.A.D.D." Dads Against Drunk Driving.

“I want D.A.D.D. to be an action. I want people to come out, help, volunteer, put some of their time in, and do what I’m doing.”

Yasinsky is still in the process of setting up a website for D.A.D.D.

For now, anyone wishing to volunteer their time can email him at: yaz007@shaw.ca

Yasinsky says his tips have led to police charging five impaired drivers.