Elon Green is the author of “The Man Nobody Killed: Life, Death, and Art in Michael Stewart’s New York” and “Last Call: A True Story of Love, Lust, and Murder in Queer New York,” for which he won the Edgar Award for Best Fact Crime. He has written for The New York Times Magazine, The Atlantic, and The New Yorker, and appears in “Unspeakable Acts,” Sarah Weinman’s anthology of true crime.