and he told the jury, one more important detail. the s-u-v in the video had a fog light defect, one that cast a distinct headlight pattern. >> what we're seeing from this vehicle is that it has this white light that is on the ground that moves in front of the vehicle. >> detectives tracked down gil's white s-u-v -- which he sold a few weeks after tom's death and drove it along the same route seen in the security footage. >> sure enough, when we went out to the scene and did our tests, we turned the lights on and there was the pattern that was quite visible. >> gil's car had the same defect visible in the video. prosecutors thought it was just what they needed to place gil at the crime scene and tie all their evidence together. >> that was a unique feature to that vehicle. and it was still exactly the same a year later. i have yet to find another nissan pathfinder, color white,