Police in Isabella County are looking for a man they say is placing pornographic material on women's windshields, and then watching as they discover it.

Sheriff Michael Main tells ABC-12 his department believes the man drives a silver Chevrolet Traverse, and worries that his behavior may escalate.

"I'm concerned that it, you know, it certainly could escalate to something else," he said. "Right now, it doesn't appear that that's occurred, so you know, it's imperative that we identify this person and get it stopped."