Some people who crossed paths with Luigi Mangione throughout his life say he was kind and had a promising future. How did Brian Thompson's shooter change in the lead-up to his arrest? To hear the rest of the series, follow "Burden of Proof: Luigi Mangione" for free on ⁠⁠⁠⁠⁠⁠⁠⁠⁠Apple Podcasts⁠⁠⁠⁠⁠⁠⁠⁠, ⁠⁠⁠⁠⁠⁠⁠⁠Spotify⁠⁠⁠⁠⁠⁠⁠⁠, ⁠⁠⁠⁠⁠⁠⁠⁠Amazon Music⁠⁠⁠⁠⁠⁠⁠⁠, or wherever you listen to podcasts, or listen ad-free on Apple Podcasts when you subscribe to 20/20 True Crime+. Learn more about your ad choices. Visit podcastchoices.com/adchoices