The investigation into the murder of United Healthcare executive Brian Thompson in New York has led police to question 26-year-old Luigi Mangion, who was arrested in Pennsylvania on firearms charges. Mangion was identified as a person of interest after being recognized by a McDonald's employee from police-circulated photos. Upon arrest, he was found with a ghost gun and a suppressor, items believed to be linked to the crime. Additionally, he had a mask matching the suspect's description and a handwritten note indicating a motive related to grievances with corporate America. Authorities are working to extradite Mangion to New York, as they believe he is the suspect responsible for Thompson's death.