The 'Luigi Mangione Is Not the Shooter' conspiracy theory emerged following the arrest of Luigi Mangione in connection with the shooting of UnitedHealthcare CEO Brian Thompson. As soon as his identity was released, internet sleuths on platforms like X and Reddit began scrutinizing CCTV footage, comparing the physical build and facial features of the masked suspect to Mangione’s public photos. Many claimed discrepancies in height, hair density, and posture, leading to a wave of memes questioning the official narrative and the speed of the arrest. While law enforcement presented forensic evidence, the meme reflects a broader cultural trend of digital skepticism and the 'citizen detective' phenomenon that often follows high-profile criminal cases involving corporate figures.