>> the tbi lab did examine the rustler blue jeans in 1984 and they did determine there was some blood on there. however, as to the type of stains that were present and to the possible cause, they did not make any determination at that time. >> under a magnifying glass, crime scene reconstructionist jerry findlay found tiny drops of blood embedded in the fabric, about 1/32 of an inch in diameter. it was medium-velocity impact spatter, the kind usually produced when someone is hit with a blunt object. >> medium velocity is an instrument being wielded by a human, for example, a baseball bat or a rock or something like that. it's not going to generate that much force. >> the blood stains were clustered above the knee, indicating the assailant was kneeling as he attacked. >> so whoever was wearing those