I am aware a colleague conducted interviews prior to obtaining IRB approval. This person also likely did this on a second project conducted in the same academic year. They appear to be a chronic liar with a number of fabrications on their publicly posted CV. The person also runs down other members of the university and seems to move jobs every 1-3 years.
Do I turn over my evidence? I had attempted to mentor them when I initially discovered the lapse but was met with an explosive pushback.