Well, LE has said they don't think Tammi was involved in what happened to Gabe, or that Tammi has any knowledge of his whereabouts. See the posts near the end of the LE Statements threads.
Maybe LE doesn't think TS is involved. On the other hand, isn't it more normal for LE to either be silent, or at most say, "No comment at this time"?
I'm thinking that kind of statement is tactical. It lets TS thinks she's gotten away with whatever she might have done. If she thinks she's in the clear, maybe she'll just comfortable enough to be careless here and there with her contacts and statements. And, (hopefully eventually) LE will then close right in on all who are involved.