On paper, Luigi Mangione had it all: wealth, intellect, athleticism, and good looks. But the child of a prominent Maryland family may have spurned it all in a violent outburst, committing a killing that has captivated Americans.

The 26-year-old was arrested Monday and charged with the murder of Brian Thompson, a health insurance CEO and father of two, who was gunned down in Manhattan last week. Evidence suggests Mangione endured debilitating health crises and grew enraged at the privatized U.S. medical system.

The cold-blooded killing has exposed deep frustrations many Americans harbor toward the country’s labyrinthine health care system. While many have condemned the shooting, others have hailed Mangione as a hero.

The case has also sparked intense interest in how a young engineer with an Ivy League education could have derailed so drastically.

News of his capture at a Pennsylvania McDonald’s set off a flurry of online activity, with Mangione rapidly amassing new social media followers as citizen sleuths and U.S. media sought to understand who he is.

As Americans searched for clues about his political ideology or potential motive, a photo on his X account (formerly Twitter) showed an X-ray of an injured spine.

Mangione lived in Hawaii in 2022, and according to his former roommate, R.J. Martin, suffered from back pain and hoped to strengthen his back.

After a surfing lesson, Mangione was "in bed for about a week" due to the pain, Martin told CNN. Earlier this year, Martin said Mangione confirmed he had undergone back surgery and shared photos of the X-rays.

Police said the suspect carried a handwritten manifesto listing grievances, in which he criticized America's "most expensive health care system in the world."

"He was writing a lot about his disdain for corporate America and, in particular, the health care industry," New York police chief detective Joseph Kenny told ABC.

According to CNN, a document recovered during Mangione's arrest included the phrase "these parasites had it coming."

Meanwhile, memes and jokes have proliferated online, many playing on his first name and comparing him to the "Mario Bros." video game character Luigi.

Some expressed partial sympathy, relating to their own harrowing experiences with the U.S. health care system.

"Godspeed. Please know that we all hear you," one Facebook user wrote.

Standout student
Mangione hails from the Baltimore area. His wealthy Italian-American family owns local businesses, including the Hayfields Country Club, according to the Baltimore Banner. His cousin, Nino Mangione, is a Maryland state delegate.

A standout student, Luigi graduated at the top of his high school class in 2016. A former classmate from the elite Gilman School told AFP that Mangione seemed like "a normal guy, a nice kid."

"There was nothing about him that was off, at least from my perception," the classmate said.

Mangione attended the prestigious University of Pennsylvania, earning both a bachelor's and master's degree in computer science by 2020, according to a university spokesperson.

While at Penn, Mangione co-led a group of 60 undergraduates who collaborated on video game projects, as noted on a now-deleted university webpage.

On Instagram, Mangione shared snapshots of his travels and shirtless photos flaunting a six-pack.

X users have scrutinized Mangione's posts for motives. His header photo includes an X-ray of a spine with bolts attached.

Identifying a clear political ideology has proved elusive. He reviewed Ted Kaczynski's manifesto on Goodreads, calling it "prescient." Kaczynski, known as the Unabomber, conducted bombings in the U.S. from 1978 to 1995, claiming to oppose the advance of modern technology and society.

Mangione also linked approvingly to posts criticizing secularism as a harmful consequence of Christianity’s decline and retweeted comments on the impact of mobile phones and social media on mental health.