Somehow, and I don't know how, a man dressed in the most obvious bank-heist get-up ever was allowed to step inside several different banks in recent months, stride purposefully up to a teller window, and then utter a demand for drawer cash, in one case brandishing a gun, all apparently without immediately drawing suspicion or a tap on the shoulder from a security guard.

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Anyway, police today announced they arrested the guy they think was wearing the costumes. The cops were calling him the Beastie Boys Bandit because, as they put it, "his disguises look like they came out of a music video for the song "Sabotage" by the Beastie Boys."

As a custom, nicknaming bank robbers still feels a little too throwback for my tastes. As if we're still living in a world where men wear hats and pick up an afternoon edition of the paper to hide behind on their subway commute home from work. Eh. At least this nickname was WAAAAY better than the one they gave to another bank robber last week...

Read the cops' full release after the jump.

On Thursday June 9, 2011, Portland Police Bureau Robbery Detectives arrested 48-year-old Michael Aaron Hayden for a probation violation.

Investigators believe that Hayden is responsible for a string of bank robberies in the Portland area. Hayden was given the nickname the "Beastie Boys Bandit" because his disguises look like they came out of a music video for the song "Sabotage" by The Beastie Boys.

In June 2010, a man wearing a wig, fake mustache, sunglasses and a dark colored suit with a white, button-up shirt robbed two US Banks in East Portland. The robberies occurred on June 3, 2010, at the US Bank at 1225 SE Caesar Chavez Blvd., and on June 8, 2010, at the US Bank at 1901 NE 42nd Ave. The suspect presents a demand note stating he is armed or there is a device in the bank. During the June 3, 2010 robbery, he showed a handgun in the waistband of his pants.

Investigators also believe that the "Beastie Boys Bandit" is responsible for the July 2, 2010 robbery of the Bank of the West branch located in West Linn; the January 4, 2011 robbery of the Chase Bank in Lake Oswego; the March 2, 2011 robbery of the Key Bank in Northwest Portland; the April 14, 2011 robbery at the Wells Fargo Bank branch in Lake Oswego; the June 9, 2011 attempted robbery at the Wells Fargo Bank located in Southwest Portland; and the June 9, 2011 robbery at the Bank of the West in West Linn.

Hayden is currently in the Multnomah County Jail while Federal charges are pending.

This joint investigation was conducted by the Portland Police Bureau, Federal Bureau of Investigation, West Linn Police Department, Lake Oswego Police Department, and the Clackamas County Sheriff's Office.

Anyone with information about these robberies or Hayden is encouraged to contact Detective Tony Christensen at (503) 552-5411.