Luigi Mangione, a 26-year-old with an Ivy League education, stands accused of the first-degree murder of UnitedHealthcare CEO Brian Thompson. Evidence against him includes fingerprints at the scene, a gun matching shell casings, and a notebook expressing animosity towards corporate America and the healthcare industry, potentially influenced by the Unabomber's writings. Mangione, who had a history of severe back pain and was arrested in Pennsylvania, waived extradition to New York. Despite his family's prominent background in Maryland's business and healthcare sectors, he is being held without bail on multiple charges.