and dan goodwin himself provided a dna sample. he had gone out with laura just a few days before the murder. goodwin maintained it was a casual date and said the two weren't intimate. >> since i took her out to the movies just four days before and knew her, they decided it would be advisable to test my dna. and it was tested, and i was not present at the crime scene. >> but at least the investigators had the killer's dna, and were closer to finding him. a lot closer than they knew. >>> bill sharp and dan goodwin [phones rings] it's amanda. hey sweetie. what? okay, i'll send it. one hundred seventy-two dollars for a chemistry book, what is it, made of gold? just use citi popmoney. boom. ah, she's feeling lucky. hey sweetie...cancun, yeah no, you'll be spending spring break with your new chemistry book. with citi popmoney it's easy to send money to just about anyone, anytime. visit your local branch or citi.com/easierbanking to learn more. >>> bill sharp and dan goodwin pored over the original case file of laura salmon's murder and f