It's a possibility that he was going to blow the whistle on a Gain of Function Experiments; Any research on pathogens that may, inadvertently or purposefully, increase its virulence or pathogenicity must be reviewed by the BSO and the IBC for potential inclusion in the US government’s Potential Pandemic Pathogen Care and Oversight (P3CO) program.

A potential pandemic pathogen (P3) is one that satisfies both of the following criteria:

It is likely highly transmissible and likely capable of wide and uncontrollable spread in human populations, and 
It is likely highly virulent and likely to cause significant morbidity and/or mortality in humans.