TUCSON, Ariz. (AP) — A 19-year-old woman was convicted Friday of murdering her roommate in their University of Arizona dorm room by stabbing her 23 times.

Galareka Harrison made no expression as the jury's verdict was read. She was convicted of first-degree murder in the death of 18-year-old Mia Henderson, a fellow Navajo tribal member from northern Arizona. She was also found guilty of three counts of forgery and one count of identity theft.

After court recessed, she gave a wan smile, stood up and put on a black coat before being led out of the courtroom by jailers.

Prosecutor Rick Unklesbay said the case was one "of overwhelming premeditated murder." He said Harrison planned the murder for days after Henderson accused her of stealing her student ID charge card, Social Security card, checks and $500 from a bank account.