John M. Marchetti of Clifton Heights has a peeping problem.

Upper Darby Police chief Mike Chitwood says it goes deeper than that, pointing out Marchetti has past arrests for attempted kidnapping and possession of child porn.

"He's a sicko prowling our streets," Chitwood says. "He's a dangerous predator."

But his name wasn't listed in the Pennsylvania Megan's Law Sex Offender registry.

Go figure.