If LE has not been able to verify MR's reports of why happened by now, how will they ever be able to do so? If they do not know for sure if Dylan was at the house already, I doubt they ever will. Even if he was at the house, that does not really help LE verify what happened, since they can know very little for sure as to what took place between 8pm on Sunday and whatever time they can pick up MR's alibi on Monday.
I feel as though MR will remain in this place forever; under suspicion, unable to be cleared but also not able to be proven to have done anything to Dylan. Even if Dylan is eventually found.
I don't want to lump him in with some other parents under suspicion in other cases, but it is kind of the same; even if Ayla Reynolds is found someday, what if nothing can be proven as to how she got there? Or Hailey Dunn, or even Kyron? I fear that none of these cases can ever be proven, after a certain amount of time passes.