Yes, you're both right, he didnt appear to have the correct mindset to be an investigator, he had a view he wanted find evidence for,. classic confirmation bias, and he bullied people and abused his position to cajole people into doing things (false entries onto their accounts to make them balance) that then they were guilty of false accounting, and using a theft charge to leverage a guilty plea. He was purely a loss recovery monkey, not an investigator (and certainly no cognisance of disclosure).