Pittsburgh police say a McCain volunteer made up story of being robbed, having 'B' scraped on her face.
Maurita Bryant, the assistant chief of the police department's investigations division, says Ashley Todd, 20, is being charged with making a false report to police.
Todd, A McCain campaign volunteer from College Station who reported being robbed and having a "B" cut into her cheek has done a lie detector test in Pennsylvania.
Police in Pittsburgh say Todd initially reported a tall black man attacked her after seeing a McCain bumper sticker on her car.
Police have said there are inconsistencies in Todd's story about Wednesday night -- mainly with how she described being attacked.
Police say photos and bank card information from an ATM where the college student claimed she was robbed don't show her using the machine then.
Police say Todd, who's white, told them she was attacked by a 6'4'' black man.
GOP presidential candidate John McCain and running mate Sarah Palin, called Todd yesterday expressing concern. Barack Obama's campaign issued a statement wishing her well.
The Associated Press could not immediately locate Todd.
Note: There were initial reports that Todd was a student at Texas A&M. Todd had listed this in her blog. However, Texas A&M officials confirm she is not enrolled at the university.