investigator steven peglo. >> the girl laying on the floor had dark colored hair. alex put up in her dorm room of her and clayton, she had much lighter hair. the roommate had darker hair. >> investigators knocked on student's doors questioning them. then, a nugget buried in a conversation. alex recently dyed her hair brown. they had what they needed to id their victim. now they wanted to hear from one more person, alex's roommate. when she did call in, she had been staying in another dorm room. >> we had her come to us, and we were positive. >> positive that the girl on the dorm room floor was alex kogut. lovely alex. only 18 years old. samantha turner, who rushed back to college early that morning was devastated. >> i just broke down and i knew at that point, my life was changed. >> you just knew what had happened without anyone telling you. >> uh-huh. i didn't know how, i didn't know who. i didn't know anything. i just know she was gone, and i could never see her again. >> sandra whitney and her daughter, paige, are family friends of the kogut's. paige, remember,