If he goes, it'll be
"Suicide"
Disappearance
Murder with no obvious motive or uncaught perpetrator with no or weak motive
Hit and run, no leads
Alone, crashed car into tree on empty highway
Killed in custody
Etc, including other methods which could easily disguise an attack or silencing
Non suspicious ways:
Disease
Traffic accident with cars having a dashcam and footage, etc
Still alive at end of market
This may be subjective but I'll try my best to judge fairly.
It seems like anyone on earth who believes that gain-of-function research is dangerous has an obvious motive to kill him. I'm not saying it's a valid reason, but it is a motive in the criminal sense. So I'm not sure how "Murder with no obvious motive or uncaught perpetrator with no or weak motive" could be true.
@asmith I agree in theory; that's why cases of murder where there is no known assailant will be treated as suspicious here. Even if it looks like a possibly relatively simple accident, because of the background information you listed.
In my phrasing "no obvious motive" means no local motive; and that case is under the "suspicious" header so I think it matches what your point is.