Fraternities across U.S. under fire after series of scandals involving racism, hazing, sexual assault

People walk on the Oval at the University of Oklahoma in Norman, Okla., Tuesday, March 10, 2015. Two students have been expelled from the university following an incident in which members of a fraternity were caught on video chanting a racial slur. (AP Photo/Sue Ogrocki)

Racist chants. Nude photos of unconscious women. A criminal investigation into hazing. Fraternities around the country seem to be coming under fire as never before over behavior that would shock the frat boys of "Animal House."

Despite a major national push to reduce drinking and sexual assault on campus and increase diversity, some fraternity chapters have failed to clean up their acts. Universities and the fraternities' national offices are quickly punishing the offenders amid more promises of reform.

Some critics blame popular culture, saying it's making fraternities essentially ungovernable.

"There's this underlying acceptance that boys will be boys, this is fraternity life and this is what you have to accept when you walk through the doors of a fraternity," Ellen Kramer, legal director of the Pennsylvania Coalition Against Domestic Violence, said last week.