i'm a little obsessive. >> reporter: sheilah's persistence paid off.he eventually was put in touch with the investigator looking at cold cases. a woman who dusted off the old angie samota files, took a look inside, and found some promising evidence. >> in '06 when she decided to reopen the case, she went over to lab and realized that they did have a rape kit. they did have a sample that in today's technology could be tested to try and find a dna standard. >> reporter: by 2006, dna testing had evolved. some other angie's other friends also approached police about reopening the investigation. it was sheilah who eventually made more than 700 phone calls over the years trying to move angie's case forward. she even offered to pay for the dna testing herself. >> i said, okay, i'll send you a check, i'll overit. who do i make it out to. she said you can't do that. you're not allowed. >> that's something police departments pay for, not pis. >> right. >> reporter: finally, in 2008, the dna sample from angie samota's cold case was entered into the national data