No, I am not. I have never been, either. Not... formally and by title, of course. But all regulator positions had investigative work inherently apart of assigned tasks. Occasionally.
... Regardless, it would be wise to take my advice. Why would you feel the need to seek out another opinion on this matter?
[ On the metaphorical path of AR's mind, this problem is one road, going straight, with barricaded walls up on either side to a single solution. No other paths necessary. ]