An Athletics spokesperson confirmed there have been "recent staff changes" but didn't give names or specific details.
Two of the suspects were charged with felony aggravated assault, among other charges.
After taking over the position on December 19, Kohrman is already out as Penn State's associate vice president for budget.
Andrea Dowhower will take Sims' place on an interim basis while the university conducts a national search for a permanent replacement.
"The problem is we've lost our hunger for truth. I think we've really lost our desire to really get to the nub of it. To me, our discussion was the nub of it."
Court documents say Michael Vanbelle and Tyquann Crawford face four charges, including a first-degree felony of burglary.