This is how I think about these and examples to the best of my ability since I'm not great at explaining: Nature: What a character is inclined...
These are two general tips but they have helped me a lot when writing any sort of mystery. 1. Work backwards. You mentioned you already know...
I agree that making him appalled and confused would be too common. Perhaps take a mixed approach? Maybe your character goes on a power trip, or...
Separate names with a comma.