BOISE, Idaho —  A 16-year-old girl was allegedly tied up and scalped (search) with a 4-inch knife in what police say may have been an act of revenge by another woman.

The girl, who had a punk-style mohawk (search) haircut before the attack, is recovering at home. Doctors could not reattach her scalp, which was found near a hot spring.

Police searched for Marianne Dahle, 26, who disappeared after the Jan. 18 attack at Kirkham Hot Springs (search), about 70 miles from Boise.

"When I say this gal was scalped, she was truly scalped," said Chief Deputy Bill Braddock. "The top of her head, her hair, was completely cut off."

Dahle and the victim, whose name was not released, were longtime acquaintances and hung out with a punk clique, he said.

"The motive, as near as we've been told by witnesses, was retaliation for acting in a way that the adult perceived as being offensive to women as a gender," Braddock said. "According to their creed, if you disrespect women you are not allowed to wear a mohawk."