Why Crevecoeur? With luck he'll only have to ask a few questions before moving on. Perhaps he'll speak to some newly-hired groundskeeper who's never heard of James Hathaway. And if God is at all merciful, he won't encounter His Lordship.
You are not a frightened child. You're an adult, a university graduate, a policeman.
He spots familiar faces ahead. DCs Hooper and Parry, investigating the shooting. Oh, joy. He puts on a smirk and a swagger like a warrior donning armour, and dredges up some historic trivia. If he's sufficiently annoying, perhaps they won't notice that his hands are shaking.