MILWAUKEE (CBS 58) -- Imagine being shot while sitting in your car, for no reason at all. 

That's what happened to a Milwaukee man last month. Now, police need your help to find out who did it.

It was around noon on Monday, March 23. 

A man says he was driving south on West Appleton Avenue. 

He was sitting at the light on Capitol and Appleton when he says a silver SUV pulled up beside him. 

The driver turned and fired three times into the man's car and drove off. 

Milwaukee police say the only witness they know of was a woman sitting in the shooter's passenger seat.

"He was shot in the lower back as a result of this, and he wasn't able to provide us any reason as to why this might have happened," said Milwaukee Police Captain Craig Sarnow. "He doesn't believe it's road rage, he didn't do anything, he has no idea who this guy is. He did say there was a female passenger in that car who said, 'don't shoot that guy.'"

If you know anything about this shooting call Milwaukee Crime Stoppers at 414-224-TIPS.

You can also submit a tip through the P3 Tips app. Your call is always anonymous and you could get a cash reward if your tip leads to an arrest.