See my post # 707 for the completely corrected series of events.
Your presuppositions, that he knew without doubt his son was innocent etc., are not a factual thing but a feeling you have if you had been him and these people showed up. I sympathize with the family trying to find the missing daughter, and following the lead they were given that this boy was last seen with her.
To each his own sympathies, but the differing sympathies are pretty revealing.
This is ridiculous, I never said that. I said, If I knew MY SON was innocent beyond a shadow of a doubt I would still tell him not to say a word and any parent who did not do that would be reckless.