The suspect, identified as Eric John Raber, turned himself in to a Boulder police officer who was interviewing people Saturday afternoon near the bank.
Police say about 30 minutes before he turned himself in, Raber entered a Chase Bank branch on Canyon Boulevard and demanded money from a teller, then took the note back and left. No money was stolen.
The Daily Camera reports Raber was taken to the Boulder County Jail.
(Copyright 2012 by The Associated Press. All Rights Reserved.)