it had been leaking over a tow company. and he found a fire tool that was used on one of their big, big tow trucks. >> it was the office building of the tow yard where jeff lamb worked. the tire iron had hexagonal heads for loosening and tightening nuts. it was tested for dna. >> we tried everything to test the tire iron, but the problem is it's south florida, and it rains all the time, the tire iron was on the roof for 2 1/2 months. the sun would have evaporated any dna as well as the water washing it off. >> but since it was so distinctive, as were the wounds on cathy's body, the tire iron was still a valuable piece of evidence. the hexagonal head was placed over photographs of cathy lamb's wounds. >> and you look at the injuries on cathy's face, there's no way anything in the world anything other than this did it. >> jeffrey lamb was arrested and charged with first-degree