But why didn't he try the spells non-verbally? Surely that would have worked
Don't you still have to wave your wand and stuff? There are nonverbal/somatic requirements to spells, otherwise wouldn't they fire off anytime anyone spoke of them? Anyway, he was quite frozen, so I don't find it unbelievable that he couldn't do anything. Though, I would have believed it more if maybe he had at least tried to think a spell at someone.
