I actually feel that this last response is exactly how PR should work. It has placed responsibility for misconduct where it for the actual misconduct that actually happened and needs correcting and has done a pretty good job of invalidating the histrionic claims of gender discrimination.
This additional information (the identity and reputation of the investigator and the level of detail investigated including review of the commits) taken together with JAH's commits to her own public projects [0][1] and exaggerated and overly dramatic behavior, there is more than enough reasonable doubt to vindicate the male engineer being accused of misconduct. Absent a reliable witness to the claimed misconduct or other solid irrefutable evidence (not just perceptions of what happened), the principle of innocent until proven guilty should extend to this accused individual as well.