It’s hard to give much, if any, credence to internal investigations conducted by the same Dept.   It’s a case of the fox guarding the henhouse.  The Dept’s Director has the final say re: the scope of the investigation, the findings, and the conclusions.   If the actual investigation determines there were wrongdoings, it would reflect negatively on the Dept and the Dept’s Director . . . so what is the likelihood the Director would allow that version of the investigation to be put into a written report?   The more likely scenario is that the Director will require the investigation be amended or watered-down to somehow reach a conclusion that there was no wrong-doing.