Man who armed Black Panthers was FBI informant, records show
http://cironline.org/reports/man-who-armed-black-panthers-was-fbi-informant-records-show-3753
The man who gave the Black Panther Party some of its first firearms and weapons training – which preceded fatal shootouts with Oakland police in the turbulent 1960s – was an undercover FBI informer, according to a former bureau agent and an FBI report.
http://www.youtube.com/watch?v=sOWR3ArCEqI
Timeline :
http://cironline.org/timeline-informant-history-3756