DIA, not FBI.
Sources said the Defense Intelligence Agency is the one agency that firmly
believes in the lab leak theory. According to one source, the DIA’s
confidence is based on work with a little-known institute under its control
called the National Center for Medical Intelligence, which was renamed in
2009 from the Armed Forces Medical Intelligence Center. https://www.washingtontimes.com/news/2021/sep/1/dia-leads-lab-leak-theory
