PITTSBURGH (AP) - Pittsburgh police say a McCain campaign volunteer who reported being held down by a black man who then cut the letter "B" in her face has changed her story.
Police also say bank surveillance footage doesn't show her at an ATM where she initially said she was attacked.
Police spokeswoman Diane Richard says investigators gave the 20-year-old woman a lie-detector test and are "looking at some inconsistencies" in her story.
The student, Ashley Todd, of College Station, Texas, initially said a black man robbed her at knifepoint near a bank Wednesday night and then cut her cheek after seeing a McCain sticker on her car.
Todd, who is white, now says she was knocked unconscious and doesn't remember being cut in the face. She now says she only discovered the wound later.
No arrests have been made.
(Copyright 2008 by The Associated Press. All Rights Reserved.)