The FBI is looking for the so-called Portfolio Bandit, a robber who gives tellers notes he takes from a black portfolio folder.
He is suspected in 11 bank robberies in the Denver metro area from December 2008 and Feb. 3, when he is suspected of robbing the US Bank at 1560 South Pierce St. in Denver.
In three of the robberies he indicated he had a weapon, but tellers did not see one, the FBI said in a statement.
He is described as olive-skinned, about 6 feet tall, in his 20s or 30s, and he wore a baseball cap in each instance.
He has been seen driving a blue Ford Focus or Ford Fusion with tinted windows, a silver Dodge Neon and a dark-colored Chevy S-10 pickup and an older Chevy Blazer.
Anyone with information can call the FBI Rocky Mountain Safe Streets Task Force at 303-629-7171 or Crimestoppers at 720-913-7867. A $2,000 reward is being offered.
