Luigi Mangione, the CEO of UnitedHealthcare who is a murder suspect, expressed dissatisfaction with his back surgery prior to the alleged killing.

The Ivy League computer scientist who was charged in the ambush shooting death of UnitedHealthcare CEO Brian Thompson had been dealing with back pain and the aftermath of a spinal surgery, according to reports.

According to CivilBeat, a Honolulu-based publication, Luigi Mangione, 26, informed his former roommates that he had chronic back pain and a pinched nerve.

After moving out of the Surfbreak co-op, Mangione informed his roommate that he had undergone surgery, but subsequently became unresponsive.

"He knew that due to his back condition, dating and physical intimacy were impossible, as he shared with the paper. "I recall him saying that, and it breaks my heart," I said."

Mangione's suspended Reddit account was discovered by Forbes, which revealed that he discussed spondylolisthesis symptoms such as numbness/tingling in his toes and lower back pain. He advised others to strengthen their core muscles to relieve pressure on their back.

The police have not yet made a public statement regarding the motive for the murder, but they claim that Mangione confessed to the crime in writing and left behind other evidence, such as bullet casings with the words "deny," "defend," and "depose" on them, as well as a backpack filled with Monopoly money.

Mangione's social media accounts contained an X-ray photo of screws and a plate attached to someone's lower back, along with numerous posts of him traveling to tropical destinations, hiking, and being outdoors. He also frequently discussed back pain and retweeted content about technology, AI, nutrition, and other topics.

Mangione defended the motives of Ted Kaczynski, the Unabomber, on Goodreads, a social media platform for book enthusiasts. He cited a compelling "take" on the bomber's manifesto, "Industrial Society and Its Future," from another online source.

"In the event that all other means of communication fall short, violence becomes necessary for survival," he stated. "Although you may not agree with his tactics, from his point of view, it is not terrorism, but rather war and revolution."

Martin revealed to CivilBeat that Mangione had recommended Kaczynski's manifesto to their local book club. Despite the difficulty of reading it, the club disbanded. However, Mangione, in a Goodreads post, believed it had accurately foretold the future.

"He argued that it's easy to dismiss the manifesto of a lunatic without facing uncomfortable problems it identifies, but it's impossible to ignore how accurate many of his predictions about modern society have been."

An anti-capitalist was found in a Pennsylvania McDonald's after leaving DNA evidence at a New York City Starbucks.

Authorities said that the suspect wanted in connection with the New York City ambush shooting of UnitedHealthcare CEO Brian Thompson was immediately recognized by responding officers, including a rookie cop who received praise from leaders in New York and Pennsylvania.

In the fast food joint, they spotted Mangione wearing a beanie and a coronavirus mask while seated at a table with a laptop.

WATCH: McDonald's customer recognized suspect's backpack, jacket

In court, prosecutors claimed that the suspect possessed the suspected murder weapon, a 3D-printed ghost gun with a suppressor, the same fake ID used to enter a Manhattan hostel prior to the shooting, $10,000 in both American and foreign currency, and a "Faraday bag" to block cell service.

Mangione told the judge that the cash wasn't his.

""That money must have been planted because I don't have that kind of cash," he said."

The bag he added was a waterproof one, as found through an online search of companies selling Faraday containers.

A masked assassin was caught on surveillance video outside a Midtown Manhattan Hilton hotel, ambushing Thompson on the sidewalk at approximately 6:45 a.m. on December 4th.

The CEO collapsed on the street, and a woman who witnessed the attack fled in one direction while the masked figure casually walked off in the other. Police tracked his movements throughout New York City to a bus depot, where he left about an hour after the slaying.

An interstate manhunt was launched for the suspect after surveillance images of him taken from a hostel near Central Park were widely circulated online.

In New York, Mangione is facing charges related to the murder, while in Pennsylvania, he is being accused of unlawful possession of a firearm and forgery.

He earned bachelor and master's degrees in computer science from the University of Pennsylvania in 2020 and hails from a notable Baltimore family.

In addition to attending the Gilman School, a private prep school in the city, he was the valedictorian in 2016.

The bullet casings found at the crime scene have led to speculation that the murder may have been motivated by resentment over a denied insurance claim, as seen in the book "Delay, Deny, Defend: Why Insurance Companies Don't Pay Claims and What You Can Do About It."