The recent arrest of Luigi Nicholas Mangione has shed light on his motives behind the killing of UnitedHealthcare CEO Brian Thompson. According to a law enforcement bulletin obtained by The Associated Press, Mangione's actions may have been fueled by his contempt for what he described as "parasitic" health insurance companies and corporate greed. He vocalized his discontent with America's costly healthcare system, noting a rise in corporate profits without a corresponding increase in life expectancy.

During his tumultuous arrival at the Blair County Courthouse, Mangione made a statement that was seen as an "insult to the intelligence of the American people," which was partially unintelligible amid his struggle with officers, and, had yet to secure legal representation, having asked about the possibility of a public defender during his arraignment on Monday. The suspect, a 26-year-old Ivy League graduate with a background in a well-known Maryland real estate family, has been charged with murder along with several other offenses including possession of an unlicensed firearm, forgery, and providing false identification to police.

Mangione drew inspiration from "Unabomber" Ted Kaczynski, referring to him as a "political revolutionary," suggesting a shared disdain for modern society and technology. This association was revealed in a police bulletin highlighting his admiration for Kaczynski's actions and ideology. When arrested in Altoona, Pennsylvania, roughly 370 kilometers from New York City, Mangione was sitting in a McDonald’s wearing a blue medical mask and using a laptop. A curious McDonald's customer, recognizing him, alerted an employee which subsequently led to his arrest by local authorities.

Upon his arrest, The New York Police Department reported that Mangione had been carrying a gun similar to the one used to kill Thompson, as well as the same fake ID used to check into a New York hostel, in addition to several other fraudulent documents, which included a three-page handwritten document containing expressions of "ill will toward corporate America," as reported by The Associated Press. Moreover, when Pennsylvania prosecutor Peter Weeks discussed the evidence found on Mangione in court. Mangione contested the amount of foreign currency he possessed, according to the official file.

An acquaintance of the Mangione family, speaking anonymously, expressed disbelief at the arrest of Luigi Mangione for the killing of Thompson to Fox News Digital, stating, "They are a great family, except I guess for one." Thompson's murder spurred a nationwide search for the suspect that culminated in Luigi Mangione's capture and subsequent arrest on various charges including second-degree murder and criminal possession of a weapon and a forged instrument.