Sure they do. However, when one group that represents about 10% of the population, commits the majority of the violent crimes in america... its not racist to NOTICE this little fact.
For those interested in studying violent crime statistics, much information is available at the Bureau of Justice Statistics. These statistics are broken down in a number of ways including race.
All that kind of thinking does is reduce the liability of the guys that raped her - "its not their fault, their culture or their race caused it." Its the same thinking that Jesse Jackson uses to say that blacks are unfairly treated in the justice system.
If we stopped being so obsessed with race in situations like this, we would have the credibility to do something about ending affirmative action and closing the mexican border without everyone thinking its for racial reasons.
Two boys raped a disabled girls - prosecute the two boys. Who cares what race they are.
Careful now, you're about to get hit with the old "that's only because cops, judges, and juries are all racist bigots, so more minorities get convicted than white people", or the other classic, "it is because of their impoverishment and hopelessness". In other words, any way you try to slice it, they'll tell you it's the white man's fault, that culpability lies with the white "oppressors" and not with the actual perps themselves.
Of course, someone will probably tag me as a racist/bigot for simply pointing this out...
Funny. We don't have black people here and we still have crime. Someone owes us.