IMO, this could mean Joshua’s father believes the circumstances around him missing may involve him being in trouble somehow (past history, risky behavior, mental health, illegal woes, so forth..) or
it could just be a father pleading for his son to be found by just trying to grasp at any reason or answer for him being lost in the woods.
I feel like we see this so often in missing persons cases- a family member (esp. a parent) trying to make sense of a tragic situation, just wanting their loved one to be found.
Again, IMHO.