to identify the chemical makeup of the blue fibers, palonik placed them on a plate of silica gel andped them into a solvent. >> the solvent mixture travels up the plate and it starts to separate the dyes and show different components. sort of a gratifying moment as a scientist to see each dye separating out. >> the fibers were unusual. most contain three or four color mixtures. these fibers contained seven. and the colors and the composition were identical in both samples. this meant the blue acrylic fibers on william buck's shirt came from the killer's hooded sweatshirt. >> he was wearing either that shirt, or just by pure dumb luck, he was wearing an absolutely identical shirt to that one. >> finally, investigators swabbed about the neck of the sweatshirt and found microscopic skin cells, possibly from sweat. the dna profile of those cells matched buck's genetic profile. william buck was arrested and charged with first-degree murder. and it was william buck's accomplice, vincent holmes, who revealed why kevin rice stopped his car on that fatal night. i must begin my journey, which