(CBS) — As the investigation into the killing of a Fox Lake police officer continues, there’s a lot of speculation about an internal investigation into the department, happening at the same time. Some are questioning whether the two are linked.

CBS 2’s Audrina Bigos looked into it and found out what’s happening.

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Michael Behan paid respects to Lt. Joe Gliniewicz five days after he retired as the Fox Lake Police Chief.

“There have been questions that have been coming up regarding a change of leadership in the Fox Lake police department. This is completely independent of the major crime investigation going on,” said Lake County Sheriff’s Detective Chris Covelli.

Behan announced his retirement just days after the village of Fox Lake placed him and another officer on paid administrative leave.

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That announcement came as the village launched an internal investigation into the police department.

The investigation is looking into, “the handling of a December 2014 incident involving a police officer and a male arrestee in custody…”

A source tells CBS 2 Investigators the whole thing was caught on camera. The source calls it police brutality, an inmate beaten twice in his cell.

In a statement on Aug. 21, “The village has concerns with respect to how the incident was investigated, when it was investigated and how decisions regarding the findings and discipline were reached.”

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CBS 2 Investigators submitted a Freedom Of Information Act request to the village of Fox Lake on August 5, requesting a copy of the video from inside the jail cell. That request was denied, citing an ongoing investigation.