That is completely believable actually. Legal threats are very effective at silencing whistle blower reports. The response in these cases is that the faculty (h

That is completely believable actually. Legal threats are very effective at silencing whistle blower reports. The response in these cases is that the faculty (head of the research group and the Dean) suffer reputational damage equivalent to the misconduct penalty of the offender. That is, exclusion from research (including supervision, presenting at conferences), retraction of their publications, demotion or termination. Without this, the old boys network will have its way.