some impact into a blood source, which, in this case, is mrs. hamilton. >> and blood spatter found four inches up inside of his right shirt cuff was most telling. it was direct spatter, meaning the blood landed directly on the shirt. for spatter to get up inside the cuff meant it had to be traveling at some speed. >> for it to get on the inside, the blood has to be coming at an angle capable of missing the wrist and the edge of the cuff and the outside and going on the inside of it. that puts very limited positions with which that could have occurred. >> the only way that could have happened is from somebody using their hand to either hold a weapon or something like that, and beat -- beat susan hamilton and the blood droplets come