Prince A's did himself no favours during that tv interview with EM. The explanation that being too honourable was the reason he stayed 4 days with his friend JE, after JE's conviction for sex offences against minors was astounding. Worse, PA felt the interview had gone well. It says so much about his personality and belief systems. So to address the OP's point about 'moral law', I think we know that PA's view of morality may not be the same as most of us.
He said that if he's asked to cooperate with an interview about his knowledge/friendship with JE, he will consult with his legal team and cooperate if so advised. This morning the DM on line reports that PA say he hasn't been approached by anyone. Whether he has or not, I suspect his legal team would advise him to avoid an interview. They'll have watched his tv interview .......
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How do you acknowledge Easter.