SIGN-UP: Get breaking news sent to you
There were pictures of the suspect taken from bank surveillance video.
Investigators say he pretends he wants to open an account, but when he gets to a teller, he hands over a note demanding money, and warning he has a gun.
He is suspected of robbing four banks in a week, the latest on Monday.
Today's latest headlines | ABC7 News on your phone
Follow us on Twitter | Fan us on Facebook | Get our free widget