Writings and social media posts help to reveal the secret life and troubles of Luigi Mangione, the man accused of the brazen murder of United Healthcare CEO Brian Thompson and whom so many people are calling a hero.

From the crime’s seemingly meticulous execution to the alleged killer’s manifesto and his Ivy League background to the public’s unapologetic apathy towards the victim, the investigative deep dive will ask how killers are created, what this killing says about our society and the values we place on who lives and who dies.