The suspect has robbed six banks across Southern California since August. The latest incident occurred Oct. 4 at a Bank of America branch on Brookhurst Street in Garden Grove. He also struck banks in Ontario, Fontana, Alhambra, Covina and Rosemeand.
Authorities said the bank robber uses written and verbal demands for cash. Witnesses have seen him getting away in a black vehicle, possibly a Nissan Versa.
The suspect was described as a black male between 35 and 40 years old, standing 5 feet 6 inches to 5 feet 8 inches tall and weighing about 150 to 170 pounds.
Anyone with information was asked to call the nearest FBI office or 911.