It was only part of the receipt, Bend Detective Jeff Frickey said in the affidavit, but it had the last four digits of a food stamp account and the account balance – enough to get investigators going.
State records provided a name to go with the account number, the Bend Bulletin reported, and an online search of the name turned up a pawn-shop transaction with a telephone number.
A service provider then came up with the coordinates of the phone, the Stillwater Campground in Central Oregon.
That, the affidavit said, is where 54-year-old Robert Short was arrested on theft and robbery charges.
At an interview afterward, Frickey's affidavit said, Short denied the charges, saying he never keeps receipts and would have thrown it in the trash, where anyone could have picked it up.
He also said that a hitchhiker must have stolen a black stocking cap that police kept as evidence after it was knocked off when the robber and a bank client struggled during the April 24 holdup, the affidavit said.
Police told Short his DNA was on the cap.