To be honest it's a difficult one for me. I am not a fan of Phillip Schofield, but i don't dislike the guy. I am kind of on the fence about him. But it's also his family. If a sibling came to me worried and stressed about a criminal act they had committed, my natural instinct wouldn't be to grass them up, but i do know it would be wrong too.
It's a bit like mothers who protect their criminal child until they cannot anymore. When it's your flesh and blood and you care for them, you also want to protect them. It isn't right, but it's emotions taking over. I can sort of understand it from Phillips's POV.
Thankfully I've never been in that position, and if i was i cannot honestly say i wouldn't react like Phillip did. The issue is Phillip does have some sketchy rumours surrounding him too, which doesn't make things easier.