Charges have been filed in the stabbing death of a Rockford teen.
Eighteen-year-old Cowarna Patterson has been charged with aggravated battery with a knife.
She's accused of stabbing her 15-year-old friend in the back.
Witnesses say a large group of people was gathered in the yard at 100 Willard Avenue when it happened.
The boy was taken to Rockford Memorial Hospital where he later died.
Patterson is being held in the Winnebago County Jail on a $250,000 bond. More charges may follow once the state's attorney’s office further reviews the case.