This is the kind of thing I keep talking about. There should be updates or more info on these types of evidence/ stories. Maybe I've missed it but it should be told what the outcome is.
I think it's shortsighted to say that LE should tell the outcome of the inquiry into the car. Perhaps if they thoroughly looked into it and found that there was absolutely no chance of a connection, then I could maybe see the point in updating that they closed that avenue. (Though I can also see points against it, such as to protect against finding out later that the investigation was faulty or to guard against harmful rumors in the community.)
But what if they investigated and found that the vehicle is still germane to their evidence? If that's the case, then, as someone interested in seeing this case solved no matter how long it may take, I don't need or want an update.