Reminder: former UnitedHealthCare CEO Brian Thompson was assassinated by a professional assassin because he was under investigation for corruption, he was going to start revealing things he's not allowed to discuss that would implicate more powerful people, and he never had the connections (Skull and Bones, Ivy League pedigree, military/intelligence background, etc) to get away with this level corruption.
Luigi Mangione looks nothing like the original picture the media circulated of the alleges assassin.
Luigi Mangione is both a patsy and a puppet/actor with connections to the family and political scene of Nancy Pelosi's family.
Luigi Mangione was chosen as a last because (1) the police don't want the public to think that some random guy was able to kill a CEO and get away with it and because (2) they wanted to make a mafia/US intelligence hit job to look like a political killing