It’s quite obvious they have no idea who did this hence the two sketches being so far apart in appearances. If they had any idea they wouldn’t go on national tv and say “ we have zero idea” as they would say we have some idea but are waiting on some pieces to the puzzle to rattle the killer. I have said from the get go the case was botched and it does seem that small towns in American are more prone to being out of their element when stuff like this happens and they don’t know what the hell to do (IMO). The parents I think need to step up here if they want answers as sitting around and thinking the cops are going to solve this is naive. Their children did everything they could so the killer could be found so if the police are that useless than get private investigators in, go on national tv and get the public involved.