Let me get this straight: Killer is Luigi Mangione, Ivy League grad with degrees in comp sci, avid reader and active contributor on GitHub. He has a 130+ IQ but he takes off his mask at a Starbucks to flirt with an employee, then an hour later goes and calmly kills the CEO of a major healthcare company, rides away on a bike. A week later goes to a local McDonalds where he brings the murder weapon, the fake ID he used to check into a hotel, and a written manifesto on how horrible the American healthcare system is. He somehow gets identified by the cashier after he sits down. He works on his laptop until police come inside the McDonalds, sitting there with a ghost gun and suppressor he made himself. Gotcha.