UNABOMBER: The True Story Behind Netflix’s Film And What Happened After Ted Kaczynski’s Arrest

Netflix’s UNABOMBER brings Ted Kaczynski’s nearly two-decade bombing campaign to the screen, but the story does not end with his arrest.

Starring Jacob Tremblay as Kaczynski, the 2026 film traces his transformation from Harvard prodigy and psychological-test subject into the man known as the Unabomber, while also following the FBI investigation that eventually led authorities to his remote Montana cabin. Netflix’s official synopsis describes the movie as a drama inspired by true events.

The real case, however, continued for decades after Kaczynski was captured in 1996. His later diagnosis, trial, imprisonment, deteriorating health and complicated relationship with his brother David are among the chapters that fall outside the film’s main timeline.

The Bombing Campaign That Lasted Nearly Two Decades

Kaczynski began his bombing campaign in 1978, sending or delivering homemade explosive devices to targets connected to universities and airlines.

Over the next 17 years, his attacks killed three people and injured 23 others, while creating one of the FBI’s longest-running domestic terrorism investigations.

The investigation changed dramatically in 1995, when Kaczynski sent a lengthy manifesto outlining his anti-technology beliefs. The FBI ultimately agreed to have the document published in the hope that someone would recognise its author.

That decision proved crucial.

David Kaczynski, Ted’s younger brother, recognised similarities between the manifesto and writings by Ted. David provided the FBI with letters and other documents, allowing investigators to use linguistic analysis to connect the writings to the Unabomber.

Kaczynski was arrested on April 3, 1996, at his isolated cabin near Lincoln, Montana. Investigators found bomb-making materials, thousands of pages of handwritten notes and a live bomb inside the cabin.

That is where Netflix’s film largely concludes. The real story continued.

The Six-Year Gap The Film Leaves Out

One of the most significant details missing from the movie is the long pause in Kaczynski’s attacks.

In February 1987, a witness saw a man leaving a bomb near a computer store in Salt Lake City, Utah. The sighting provided investigators with their first known eyewitness account and contributed to the famous sketch of a suspect wearing a hooded sweatshirt and aviator sunglasses.

Kaczynski then disappeared from the bombing record for roughly six years.

His next known attack did not occur until June 1993, according to the source material.

That unexplained gap became one of the less visible chapters of the wider investigation.

Kaczynski’s Mental Health Became A Major Issue

UNABOMBER touches on the psychological questions surrounding Kaczynski, including his time at Harvard and the experiments conducted under psychologist Henry A. Murray, played by Russell Crowe.

But his mental health became an even more important issue after his arrest.

When Kaczynski attempted to dismiss his lawyers in 1998 because they intended to pursue a mental-health defence, a federal judge ordered him to undergo a competency evaluation.

Federal prison psychiatrist Dr. Sally Johnson interviewed Kaczynski for roughly 20 hours and diagnosed him with paranoid schizophrenia while determining that he was competent to stand trial.

The diagnosis was not universally accepted. Forensic psychiatrist Dr. Park Dietz questioned whether Kaczynski’s writings represented mental illness or instead reflected a highly developed ideological belief system.

Why Kaczynski Pleaded Guilty

Kaczynski ultimately pleaded guilty in January 1998, avoiding the possibility of the death penalty.

He received multiple life sentences without the possibility of parole and waived his right to appeal. He later argued that his guilty plea had not been voluntary, but a federal judge rejected that claim.

The 9th U.S. Circuit Court of Appeals upheld the decision in 2001, while the Supreme Court declined to hear the case in 2002.

Kaczynski would then spend more than two decades in federal prison.

His Final Years Were Marked By Cancer And Isolation

Kaczynski remained at the federal supermax prison in Florence, Colorado, for more than 20 years before being transferred in 2021 to a federal medical center in Butner, North Carolina.

He was diagnosed with rectal cancer in March and died by suicide in his prison cell on June 10, 2023, aged 81.

His death came nearly three decades after his arrest and more than 40 years after the first Unabomber attack.

What Happened Between Ted And His Brother David?

David Kaczynski played a pivotal role in the investigation, but the brothers’ relationship after Ted’s arrest was deeply strained.

While imprisoned, Ted wrote to supporters and pen pals, but he did not respond to letters from David.

David said in 2016 that he wrote to his brother “two or three times a year” and sometimes sent books. He also said that what little he knew about Ted’s circumstances came from the media because Ted did not answer his letters.

In April 2025, David told The New York Times that he still had never heard back.

The silence adds another dimension to a case in which David’s decision to contact the FBI ultimately helped bring his brother’s bombing campaign to an end.

The Story Behind UNABOMBER Goes Far Beyond The Arrest

Netflix’s film focuses on the forces that shaped Kaczynski and the investigation that finally identified him. That makes the 1996 arrest a natural endpoint for the movie’s story.

But the real-life case did not stop there.

The years that followed included a controversial mental-health evaluation, a guilty plea intended to avoid the death penalty, unsuccessful attempts to challenge that plea, decades in federal prison, a cancer diagnosis and Kaczynski’s death in 2023.

Meanwhile, the brother whose recognition of Ted’s writing helped crack the case continued to receive no response from him.

UNABOMBER is now streaming on Netflix.