DENVER -- Federal prosecutors have decided against filing misdemeanor charges against a woman who refused to show identification when a bus she was riding in entered federal property.

Deborah Davis, 50, of Arvada, Colo., was taken off a Regional Transportation District bus, handcuffed and issued two petty offense tickets on Sept. 26 at the Denver Federal Center, a sprawling campus of federal offices in Lakewood, Colo.

Davis said the bus she took to work passed through the Federal Center, and that federal officers would routinely board it asking for identification.

She said the officers with the Federal Protective Service just looked at the IDs and did not record them or compare them with any lists.

After reviewing her rights, one day in September she refused to produce her ID and she refused their orders to get off the bus. She said she was removed from the bus, handcuffed and ticketed for two petty offenses.

U.S. Attorney's Office spokesman Jeff Dorschner said charges wouldn't be filed because of a technicality involving the signs on the day of the incident. He would not elaborate.

Federal officials have been checking the IDs of anyone entering the center since the 1995 bombing of a federal building in Oklahoma City.

The ACLU had agreed to help defend Davis, who had been scheduled to appear in U.S. District Court on Friday.

Her case prompted a Web site that documented her troubles. It calls her "the Rosa Parks of the Patriot Act generation."