I still wonder though if the death of Dr. Wiley was caused by Arab terrorists. Seems that there was a spate of unusual deaths of microbiologists from around the world.
The 20th hijacker, Mr. Moussaoui, had an African-American roommate in OK named Mr. Menepta. Mr. Menepta was born Melvin Lattimore in St. Louis and converted to a radical form of Islam and associated with groups advocating violence against the U.S. government. In court testimony, Mr. Menepta was connected to the OKC bombing and the 1993 WTC bombing.
I don't think we can rule out a Middle Eastern/ militant Islamist connection merely because the shooter was an African-American, based on Mr. Menepta's example.