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+.
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