His 18 yr old was the valedictorian. So he is a very intelligent young man. But he believes 100% in his dad's innocence. So I wonder what he thinks happened to his mother. Does he believe she fell and bumped her head and died?
Once he is finished with school and is self--supporting, he might be better able to handle the obvious truth. He may not be able to handle the trauma at this point in his life.
On the other hand, we have seen evidence that his father has no moral problem getting rid of even those he has professed to love. In addition, we are seeing how pervasive the network of evil is in Drew's sphere. Maybe this unfortunate young man has had his life threatened, or the lives of his siblings. I don't find that unlikely at all. So what choice does he really have? If the subhuman would murder his mother, why not him? Or have those on the " outside" do it, or at least threaten to.
Conversely, maybe bribes were used rather than threats. With everything his father 'has' on other morally bankrupt insiders, I'd think many of them are wanting to be VERY generous towards Peterson's offspring.
Yep, if I were in his shoes, I might NEVER feel safe telling the truth about his poor mom's heinous murder and his stepmother's violent and gruesome homicide while he was even in the same house!
On the other hand, maybe after DP is put away for good, this young man will write a tell-all book. I would read it. I just hope he is not morally bankrupt like his sperm donor.