This sounds similar to the "wilding" that occured in NYC/Central Park almost 20 years ago - but that was all black-males-on-lone-female. This situation with groups of blacks assaulting young white females ... unimaginable.
Very similar.
Someone asked me if I thought the girls could have "provoked" the attack somehow. I do not think that anything these girls could have said would have been provocation for this. I fear for my kids, but I fear for all of us when we repeatedly tell one set of people that they are permanently victims-for-life and deserve something from anyone not in that set of people.