For the time being Dushi, that information has only been said and confirmed by his mother. As stated on the article I posted above, the LE is saying nothing at all.
In another site, locals seem to know the identity of said person, and the reason for not identifying that person. I wont repeat it hear because at this point that is hearsay.
If this turns out to be true, I do hope, that MC told LE about him not being alone in the car,
the very first day (Sunday) when Amber was reported missing. I seriously don't understand why MC didn't mention this to the reporters when he was interviewed.