Wells Fargo has increased to up to $10,000 the reward it is offering for original information leading to identification, arrest and conviction in connection with nine robberies of financial institutions in the Phoenix metro area.
Investigators believe the robberies were committed by the same man, whom they have dubbed the "Black Binder Bandit."
Subject carries a black binder, or black bag, when approaching tellers.
A black and silver revolver has been seen inside the black binder. Most robberies have occurred on a Thursday, Friday or Saturday at a Bank of America or Wells Fargo location in the East Valley.
The nine robberies took place between September 2010 to June 2011 all across the East Valley.
People who have information should contact the FBI at (602) 279-5511.