It's shoddy work. And what really opened my eyes was that bra analysis. That bra was ripped up. The straps were ripped apart, and half the back of it was ripped out, which caused the clasp to fall off it. With all that yanking and ripping going on, I don't see how RS's dna, in minute bits, was just on the metal hook--IF he had been one of the ones ripping on her bra.
And to boot, RG's DnA IS on the bra, so we have a scenerio of RG and RS playing tug of war with the bra? It would have been in two pieces if you had two men violently going at the bra. But RG would have won, seeing as RS was only touching the tiny metal hook, supposedly.
Also, of note is the fact that no one needs to touch the metal hook to undo a bra. You can if you want to, but it's the pinch that gets the bra undone. So if RS had been trying to unhook it, and the hooks are inward, more toward the body, he would have HAD to have touched the rest of the bra. It's just not possible to only touch the metal hook.
BUT in the crime scene video, we see gloved techs touching the metal hook with their dirty unchanged gloves.
http://www.youtube.com/watch?v=UMaTI0SiuLw
Notice not even a minute into the video, two different techs have touched the metal hooks.Then they drop it on the dirty floor, then it appears to stick to the guy's hands as he tries to bag it. So I'm certain RG AND RS's DNA probably got on it during that video. I'm convinced that neither RG or RS ever had to touch it in the first place. Oh, and this video is not to mention whatever touching of it the techs were doing when they FIRST saw the thing 46 days earlier.