DEKALB, Ill. (CBS) — The state’s attorney of DeKalb County is asking Illinois State Police to investigate the Northern Illinois University Police Department.

A judge has ruled that NIU police intentionally withheld evidence in a rape case.

LISTEN: WBBM Newsradio’s Steve Miller Reports

The accused in that rape case is a former NIU police officer, Andrew Rifkin. He was charged with sexually assaulting a student last year and then fired by the NIU Police Department.

A judge says the police department did not turn over to DeKalb County State’s Attorney Clay Campbell statements from witnesses who said the sex was consensual.

“I asked the Illinois State Police to investigate this because it’s clearly an egregious violation of basic constitutional principles,” Campbell tells WBBM Newsradio.

The accused officer pleaded not guilty. He’s out on bail.

The NIU Police Department could not be reached for comment.

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