I have wondered if it was possible that LE is aware of the dialogue that is taking place in regards to CT and is letting the public run with it. It would allow them to focus on another individual without that person or anyone else being the wiser.
However, it is MY understanding- again, JMO, that CT HAS been questioned at least twice by LE, one time extensively. Is it possible that she is "playing along" in order to catch the real killer? That would be very altruistic on her part and could help to restore her reputation once an arrest is made and this all blows over.
To what extent would they allow this to go on, though? CT and AJT are being torn apart in the court of public opinion and they have to know this is happening. However, LE hasn't said that anyone on the SW is a suspect- in fact, they have said that they aren't (at this time, at least). So I guess they could come out, after the arrest of SWATPERP, and say that they never said the T's were suspects and we're sorry for the damage done to them. I don't really know how this type of thing work, so please correct me if this isn't typically done.