"I was there. It got really out of hand."

What Kenneth Pruitt witnessed Monday-- nothing short of shocking.

Six teenage girls-- no older than 16-- in an all-out melee turned criminal near Lansing's Comstock Park

"The accused got demanding of the victims and asked them to undress and some sexual assault occurred," Lt. Noel Garcia of the Lansing Police tells News 10.

Pruitt's own sister, he says, is serving three weeks in juvenile detention for her role in the assault. Pruitt says girls fighting girls is something he's seeing on a regular basis, over "ignorant" things. The fight Monday, he says, stemmed from an argument about a party two weeks ago.

"Earlier this morning I saw six other girls fighting," he says.

"There has been an increase in violence in girls, and the number of girls in the juvenile violence system," notes Jill Peck, who works at Highfields, an agency for at-risk children. Peck is also a social worker.

Peck says girls are typically more verbal and emotional than boys, and as we've seen from viral videos, are growing more daring. Peck says girls just might not know anymore how to deal with additional stress.

"We all show frustration in different ways," she says. "Girls are doing it sometimes unfortunately violently. Their violence tends to be emotional as well as physical."

Peck says girl on girl fights, like the one that happened in Lansing, are easy to sensationalize because they happen less often than boy on boy fights. But if people do that, they could be creating an even bigger problem.

"If we don't address the situation occurring and provide services, we stand a risk of it increasing," Peck says.

It's anger mis-management that no one wants to see.