greg winkler: you could see blood on the walls, blood on the light switches. there was blood in the kitchen. bob dunham: i said, i think we have another murder by the same offender. hal johnston: they said, you need to catch this guy because he will probably strike again, and he'll be getting good at it. he was out there, just waiting. there's evil all around us. [theme music] hello, and welcome to "dateline." college students brook baker and erika norman were ambitious young women, each hoping to leave her mark on the world. while they didn't know one another, brook and erika suffered the same tragic fate, a future cut short by a killer. after each crime, the murderer seemed to vanish into the campus crowd, until investigators uncovered a crucial clue and exposed the evil among them. here is "evil in a college town." college is a time like no other, a time to be independent, explore passions, meet new people. and each semester marks a fresh start, when students feel invincible, never imagining that a carefree weekend could be their last. that's how it was for