Dr Julian Morris Morris said he had "reason to suspect that Professor Arday died an unnatural death".
Deborah Prentice is seen in public for the first time since former professor Jason Arday's death.
Jason Arday's family spoke of the "public cruelty" the academic faced before his death last week.
Jason Arday, the former University of Cambridge professor at the centre of a plagiarism row, was found dead last week.
The hub is funded by the Medical Research Council and based at Cambridge Biomedical Campus.
Lord Simon Woolley said Arday had been "hounded" by the media and pursued relentlessly.
Vice-chancellor Deborah Prentice acknowledged the "anger and anxiety around this damaging and difficult case".
Amanda Cole previously hid her condition but now wants others to "tic freely" without embarrassment.
One talk by Arday is "cancelled at the request of the speaker" and others are removed from listings.
