Jack Kerouac and Lucien Carr. Aside from Kerouac's smoldering good looks, I hadn't realized Carr — center of the notorious David Kammerer stabbing of the Beat Generation heyday — is the father of Caleb Carr, author of The Alienist.
Lucien Carr hung out with Jack Kerouac and William S. Burroughs, who later published an account of the day Carr stabbed his old Boy Scout leader, David Kammerer, with his old Boy Scout knife, tying his hands and rolling him into a river to make sure the job was done right. To be fair, Kammerer had been following Carr all over the country for years, and Carr had had enough. His son Caleb grew up to be a suspense novelist.