HOWARD LAKE, Minn. -- Christopher Rossing has been missing since August 22. Each day that passes without him is heart wrenching for his family.

One of the last places the 25-year-old was seen was Troubles Bar in Howard Lake. No one knows what happened to him after that. Rossing's car was found near a gas station with the windows rolled down and the keys still inside.

"He didn't show up or call -- and he always calls," Kimberly Imker, Rossing's cousin said.

His family and friends have organized search after search of Howard Lake.

Over the weekend hundreds of volunteers helped scour every back road of the city with no luck.

"We keep on getting dead ends. We've basically canvassed Howard Lake as much as we can and so we don't know if he jumped in a car and went with somebody somewhere," Susan Rossing, Christopher's aunt, said.

A $5,000 reward is now being offered for any tip that brings Rossing home.