It wasn't clear why Brewster was traveling in Roland, just west of Fort Smith, Ark., and more than 1,000 miles from Erie. Investigators also hadn't determined whether Brewster is terminally ill, said Danny Hammon, a sergeant with the Roy, Utah, police department.
The federal arrest warrant issued in Pennsylvania indicates that Brewster is wanted for allegedly borrowing but not returning his Florida acquaintance's black Chevy Captiva. The vehicle was similar to one described by witnesses at several of the robberies authorities think Brewster committed.
No one was hurt in any of the robberies and officials declined to say how much money the suspect stole, except for the $4,080 taken from the Erie bank, which was disclosed in the FBI arrest warrant.
Associated Press writers Caryn Rousseau in Chicago and Joe Mandak in Pittsburgh contributed to this report.