Sara, Doc Robbins, Greg and Catherine (who processed and signed off on the cuffs part) can be legally cleared pretty easily. There's no way to prove, beyond reasonable doubt, that RAY put the cuffs on. There are two days where Haskell was 'missing' (between LA and Vegas) and anything could have happened. So them signing off saying 'Well, we saw the wrists but it wasn't a cause of death, and we didn't find evidence of them anywhere, so logically it occurred somewhere else.' is accurate. The problem is they all KNOW it's a damn lie. Catherine can prove it, too, but chose not to. Sara and Greg (and Dr. Robbins) have suspicions and no proof.