A sixth-grade girl who said she was sexually abused by a gunman at Farnsworth Elementary last week apparently fabricated the story, investigators say.

The girl told school officials and later police that she was sexually assaulted prior to class July 26 by an armed man in the restroom of the school.The incident prompted angry parents to rally, demanding better security and criticizing the school for allowing the girl to be harmed.

West Valley detectives wrapped up their case Thursday, indicating that after the evidence had been evaluated, the girl confessed to lying about the incident.

Immediately after she had reported the attack, detectives spent several days combing the Farns-worth restroom for clues, eventually coming up empty-handed.

Using high-tech forensics, they searched for footprints and fingerprints with the aid of a laser light and chemical analysis.

Police are now working with Granite School District and the Farnsworth Elementary principal regarding possible counseling for the student. Security will continue as usual at the Granite schools.