Prison... why? Send him to a mental hospital... I don't think he would do this to others... He's not a danger to the public. Let's keep our prisoncells for criminals... Poor soul...
Although it's rather a morbid and illegal thing to do, I think it's more than a little touching that he'd go to that length to be with his dad again and I agree with the majority that this man needs phsyciatric help alot more than a prison sentence.
It would be a miscarriage of justice to charge him with anything - he's not working with a full deck. Get him help and get Pops back in the ground.