Why wait 3 days to report your son missing?....
1. He's not missing, he's running, and they know it.
2. He's been gone for days at a time on previous hiking excursions, so this wasn't unusual until Friday. (Curious to know if there is a history of this)
3. He went "hiking" and didn't come back, they suspect he's running, and want to give him a head start.
Am I missing a scenario?
I'm trying to wrap my head around why they wouldn't be concerned about him missing in this environment until 3 days after he left.
Why pick up the car, but not notify police he was missing then? Why pick up the car at all? If you are trying to cover for him, why not leave it there? Why point LE to this location at all after taking the car, unless they believed by then he was long gone?
If they really went to the car because they were concerned about him and then saw the note left on it, why not report it then? It doesn't make sense unless running was either a plan they knew about OR strongly suspected.
Am I missing a scenario that doesn't point to his parents giving him time to run?