phenolphthalein and that tested positive. >> reporter: then there was more. remember that car seen by the newspaper carrier parked a mile from the farmhouse the night of the murders? detectives had found it, they believed. a 1997 ford contour owned by nick sampson's brother. and it had been cleaned and detailed actually at 5:30 easter monday morning just hours after it had apparently been used in the murders. who details a car at 5:30 in the morning? >> that's exactly why the detectives thought it was pretty suspicious. >> reporter: but wait, it gets even better. the car had been searched for evidence once and nothing was found, but then csi chief kofoed got a lead from one of the investigators. >> when matt confessed, he said he threw the shotgun in the backseat of the ford contour. he said maybe you can find some transfer evidence there. take another look at it. i said, well, maybe we missed it.