A teenage girl entered a guilty plea on Friday on charges that she took part in an attack on a 13-year-old girl that was recorded and posted to YouTube.
The unnamed DuPage County girl will be sentenced next month. She's the second girl charged in the attack.
The defendant's attorney said his client agreed to plead guilty to a charge of mob action after prosecutors dropped the more serious charge of aggravated battery.
"This was a one-time act of indiscretion by a juvenile with a clean record, attorney Michael Botti told Judge Thomas Riggs in court Friday, according to the Chicago Tribune. "She is humbled and remorseful for the incident."
The video showed two girls attacking the victim and shouting at her. Others students can be seen laughing and cheering the girls on.
The video has been removed from YouTube, but prosecutors have a copy of it and plan to show it at the girl's sentencing, currently scheduled for Feb. 24.
The victim, now an 8th grader, was not seriously injured in the attack. She and her mother were at Friday's hearing but did not comment. They said they will make a statement following the sentencing.
The first girl charged in the attack is currently a freshman now living in Wisconsin. She plead guilty to aggravated battery in December and will be sentenced later this month.