Nobody appears to be looking for any other suspects. They don't just "come forward" on their own.
It's not that I don't think they should suspect JM. I do - because he was the last person seen with her. But considering the lack of evidence up until a whole week after she disappeared I believe they should be considering other options as well.
How do we know they don't have evidence? The police don't go around charging someone for abduction and for defiling the victim based on a whim. Imo, they do have evidence and once they obtained the evidence needed is when they charged him. If they just wanted to arrest him without evidence to support it they could have done that days ago. There is a valid reason why they held off on charging him until they did.
Why would LE be looking for other suspects when the evidence is telling LE... JM is the one?
It takes time to gather evidence and get the results. And there will be even more evidence coming back from the lab than has already been sent and returned.
I do believe they have evidence. Of course they are not going to disclose what that evidence entails nor should they.
I am sure his attorney is trying to persuade him to turn himself in. Yet, if he is in contact with JM it doesn't seem to be working.
I think JM knows that he left evidence behind that will tie him to Hannah's abduction. He probably never thought LE would come there and impound his car or search his home or phone.
So, imo, he wont come back, and right now, he knows if he is also guilty of other crimes as well.
There is no incentive for him to return.
This may end badly. Not by LE because they definitely want to arrest him and bring him to justice but if he is armed he may think the cowardly way out is to have a shootout with LE.
IMO