I wonder if he was ever reported missing. If not, I imagine that would implicate the parents. He has siblings who are living. Do they remember anything about their brother?
I’d like to think the parents weren’t involved, but the police haven’t released the parents’ names “out of respect for” the surviving siblings.
Is that standard operating procedure?
Siblings from both sides, the mother and the father?
Obviously, a second marriage, or parents sharing care of kids, living together.
My training from watching movies and TV, tells me that, it was the step-dad, and both he and the mother never reported it and got away with it. The siblings were kept in the dark or were told lies.
TV and the movies teach at-home-private investigators a lot. ;)