Renee Sweeney, a student at Laurentian University, was working at an adult video store to help pay for school. It was a quiet place where she could do her homework when there were no customers. Shortly after 11 a.m. on Jan. 23, 1998, a man entered the store, stabbed the 23-year-old student 30 times, stole $200 from the cash register and fled. He left evidence behind -- including DNA and a jacket -- but 20 years later police still don't know his identity. With a growing reward for information and the assistance of new technology, Renee's sister hopes someone will come forward and help identify the killer.