April 16, 2009 11:47 pm Frat House Investigation USC Fraternity is under investigation for alleged sexual assaults. US & World Videos 3:41 Entry restricted at USC as protests continue on campus 0:44 Security guard shot at $12 million Encino home 3:26 Confrontations occur at UCLA campus amid ongoing protests 2:44 Tommy Trojan statue cleaned after vandalism 0:57 Fights break out at UCLA between pro-Palestinian, pro-Israel supporters