assaulted them >>> associate professor caroline held man had been teaching for seven years, along with daniel durks, they have become activists for sexual assault victims, saying they did not intend to do so, but students came to them, pouring their hearts out. >> i have been here since 2011. over that time i have talked with dozens of men and women who have been raped, sexually assaulted, battered. all of these things. >> last april helmand and dirks filed a federal complaint. in it 42 oxidantal students alleged they were raped for assaulted since 2009. >> another woman also a junior told us she was raped last year by a repeat offender after a campus dance. >> there was drinking involved, and i ended up being taken home by someone that i actually don't remember being taken home by. and ended up having sexual relations with him, without my knowing. morning. this? month. >> reporter: did this guy assault other women? . yes, we know that he has been found guilty of sexually assaulting another woman. >> the vast majority of sexual assaults, over 90%, are perpetrated by serial offenders. victims. >> cl