Ben Oberto is from New Berlin, Wisconsin.
On Wednesday, he was in Crystal Lake for a work appointment. He called his wife and told her he'd be home in time to put their son to bed, but he never made it home.
Oberto's wife called police, who tracked his phone to Rosemont, but it has not been used since. The man's car is still missing.
Police in Wisconsin and Illinois are investigating.
No further information was immediately available.
SEE ALSO | Missing father faked death, left country to meet with another woman: Wisconsin sheriff