Searching - 2018 - 7/10

Near the end of semester, the sophomore daughter disappears.
Probably with friends, maybe on a camping trip.
Eventually the father grows concerned, phones the police, and begins looking himself.
He is tech savvy, but a neophyte in his secretive daughter’s world of social networking.
Soon, the father realizes he doesn’t really know his child, at all.
Well constructed thriller with corkscrew twists – and – on second viewing, cannily placed hints and clues.