Police fear Luigi Mangione plans to end his life like the Unabomber whose book he obsessed over

Suspected assassin Luigi Mangione had eerily similar traits to notorious 'Unabomber' Ted Kaczynski, some netizens discovered - with one even branding Mangione as 'our generation's Unabomber.'

The X user noted that the 26-year-old suspect is 'extremely smart, well built and with an anti capitalism manifesto,' just like that of Kaczynski, who took his own life inside a jail cell last year at the age of 81 as he suffered from late-stage cancer.

Both Mangione and Kaczynski were described as highly intelligent, with Mangione serving as his $40,000-a-year prep school's valedictorian before going on to study computer science and engineering at Ivy League University of Pennsylvania - and Kaczynski starting at Harvard at the age of 16.

The Unabomber - who engaged in a 17-year-long bombing campaign before he was caught - went on to study mathematics as a PhD student at the University of Michigan and took a professor position at University of California Berkeley in 1967.

Over time, though, he developed a disdain for technology and many aspects of modern society.

Kaczynski eventually secluded himself from society in a cabin in Montana, where he wrote a 35,000-word essay saying he was trying to bring about a 'revolution against the industrial system' as he spoke out about the ills of modern society.

That manifesto was later published as a book - which seemed to have resonated with Mangione decades later.

He praised Kaczynski in posts on Goodreads as an 'extreme political revolutionary,' writing: 'It's simply impossible to ignore how prescient many of his predictions about modern society turned out.'

'When all other forms of communication fail, violence is necessary to survive,' Mangione wrote. 'You may not like his methods, but to see things from his perspective, it’s not terrorism, it’s war and revolution.' 

He even quoted Kaczynski on his page, with excerpts from his ramblings including: 'Imagine a society that subjects people to conditions that make them terribly unhappy then gives them the drugs to take away their unhappiness.'

'The concept of "mental health" in our society is defined largely by the extent to which an individual behaves in accord with the needs of the system and does so without showing signs of stress,' read another excerpt.

Another criticized conservatives for increasing 'the life-expectancy of those of us who live in "advanced” countries,' at the expense of society.

'[They] have made life unfulfilling, have subjected human beings to indignities, have led to widespread psychological suffering (in the Third World to physical suffering as well) and have inflicted severe damage on the natural world,' the excerpt reads.

'The continued development of technology will worsen the situation. It will certainly subject human beings to greater indignities and inflict greater damage on the natural world.

'[I]t will probably lead to greater social disruption and psychological suffering, and it may lead to increased physical suffering even in "advanced" countries.'

Others, like a quote from the Indian philosopher Jiddu Krishnamurti, took aim at 'sick society.'

'It is no measure of health to be well adjusted to a profoundly sick society,' the excerpt read. 

Friends now say Mangione seemed to have become radicalized after being laid off from his job at TrueCar last year and undergoing surgery for debilitating back pain earlier this year, according to the Daily Beast. 

RJ Martin, the founder of the co-living space Mangione lived in in Hawaii, noted to Honolulu Civil Beat that the accused assassin suffered for years from a misaligned vertebrae that would pinch his spinal cord.

Mangione tried reading books about improving back pain, according to his Goodreads account.

But the situation apparently became untenable shortly after Mangione moved to the island, when he became bedridden for a week following a basic surfing lesson, Martin explained to CNN.

'It was really traumatic and difficult. You know, when you're in your early 20s and you can't, you know, do some basic things, it can be really, really difficult.'

The roommate said while adding that Mangione sent him X-ray images of his spine.

'It looked heinous, with just giant screws going into his spine,' Martin said.

Mangione suddenly went 'radio silent' while recovering. He sought alternative forms of pain management, including psychedelics.

While in recovery, Mangione apparently started taking psilocybin, also known as magic mushrooms.

He even added to his Goodreads a book called ‘Psilocybin Mushrooms of the World: An Identification Guide’, and ‘Mushrooms of Hawai’i: An Identification Guide,' as well as a book called 'How to Change Your Mind: The New Science of Psychedelics.'

Mangione also went on to live for a time in Japan, writing in mid-April that its 'urban development is an evolutionary mismatch for the human animal.

'The solution to falling birthrates isn't immigration. It's cultural,' he posted on X, as he called on countries to 'encourage natural human interaction, sex, physical fitness and spirituality.'

In other social media posts from that time, Mangione called for pornography to be regulated 'no less than alcohol, cigarettes and travel.'

And in yet another, he wrote the 'evolutionary mismatch of homo sapiens and its 21st century living environment is unfathomably insane.

'Is it surprising to see so few well-adjusted individuals?'

But friends he stopped communicating with them, and soon, Boston-based designer Daniel Collins, took to X in a last-ditch attempt to contact Mangione, saying that ‘nobody has heard from you in months.’

‘Hey man I need you to call me,’ Collins wrote to the suspected killer on September 7 this year. ‘I don’t know if you are okay or just in a super isolated place and have no service. But I haven’t heard from you in months.

‘Your made commitments to me for my wedding and if you can’t honor them I need to know so I can plan accordingly’

On October 30, another friend with the X username TheRealMandusa wrote: ‘Hey, are you ok? Nobody has heard from you in months, and apparently your family is looking for you.’

On November 26, a third X user with the name P. wrote: ‘Thinking of you and prayers everyday in your name. Know you are missed and loved.’

His family was so concerned about him that he was reported missing on November 18, according to The New York Post. 

Many said they did not know his whereabouts until he was arrested Monday in connection with the shooting death of UnitedHealthcare CEO Brian Thompson. 

The 50-year-old CEO was in the Big Apple on December 4 to host UnitedHealthcare's annual investor meeting, where he was set to detail the insurance company's massive profits for the year.

Surveillance camera footage showed him walking outside a Hilton hotel in midtown Manhattan when he was shot at point-blank range by three bullets.

The shell casings were later found to have the words 'deny,' 'defend', 'depose' written on them, in an apparent attack on health insurance practices. 

He fled the scene on bike and apparently took a bus out of the Port Authority, before being caught on Monday at a McDonald's in Altoona, Pennsylvania.

Several staff members noticed the masked man, who sat quietly reading after ordering a drink from the fast food establishment.

One employee then called the authorities after a customer also mentioned quietly to them that he resembled the man that authorities had been hunting for nearly a week.

When police arrived, they found the suspect wearing a medical mask and looking at  a silver laptop computer, with his backpack on the floor near the table, according to charging documents.

As soon as he pulled down the mask, rookie Altoona Police Officer Tyler Frye said he and his partner immediately recognized him as the suspect accused of gunning down Thompson on December 4.

'We just didn't think twice about it. We knew that was our guy,' Frye told reporters at a news conference Monday night. 

Police say Mangione proceeded to give officers a New Jersey driver's license bearing the name Mark Rosario with the birth date of July 21, 1998.

When a cop then asked him if he had been to New York recently, he 'began to shake,' the charging documents say.

'He became visibly nervous, kind of shaking at that question. And he didn't really answer it directly,' Altoona Police Chief Derek Swope said at the news conference.

'The suspect didn't have to say a lot after that question to show that he was very nervous about [the officers].'

But cops at the scene soon realized the New Jersey driver's license was a fake, at which point one officer told him that he was under official police investigation and if he lied about his identity, he would be arrested.

Upon hearing this, Mangione allegedly provided officers with his true identity.

When he was then asked why he lied about his name, the suspect is said to have replied, 'I clearly shouldn't have.'

He reportedly had with a 3D-printed ghost gun similar to the one used in the killing, along with a gun silencer, four fake IDs and a handwritten manifesto when he was taken into custody.

It read: 'These parasites had it coming. I do apologize for any strife and trauma, but it had to be done.'

The manifesto even 'mirrored the quotes' Mangione had shared on Goodreads, according to the New York Post. 

The Mangione family said they were 'shocked and devastated' in a statement release on Monday night.

'We offer our prayers to the family of Brian Thompson and we ask people to pray for all involved,' the statement read.