Steve Neavling

A former deputy police chief in Markham, Ill. was caught with his pants down and now he plans to come clean.

Tony DeBois is expected to plead guilty to lying to the FBI about a sexual relationship he had at the police station, The Chicago Sun-Times reports.

But it’s unclear how that will affect allegations by a female prisoner who claims she was sexually abused by him.

The burly 42-year-old cop said he was “embarrassed and ashamed” that he lied to the FBI to hide the affair from his wife and denied assaulting anyone.