Anthrax Researcher "Drowned"
In November 2001, the body of noted biologist Don C. Wiley was discovered in the murky waters of the Mississippi. His car was found abandoned on a nearby bridge. As there was no evidence of either suicide or murder, the local authorities, along with the FBI, eventually ruled his death an accident. Wiley had apparently exited his car on a bridge to examine a dent. When a semi-truck passed by, the wind gust pushed Wiley over the bridge's railing and to his death.
But conspiracy theories developed the moment the public learned that Wiley's work with viruses and human cells was being used to determine the sender of anthrax mailings plaguing Washington.