Ted Kaczynski, also known as the ‘Unabomber’, has passed away at the age of 81, according to reports from The New York Times. The notorious serial bomber was serving a life sentence in prison after pleading guilty to 16 bombings between 1978 and 1995 that killed three people and injured dozens more.

Kaczynski, who had a Ph.D. in mathematics, was known for his extreme anti-technology views and his attacks were often targeted at university professors and those involved in the development of modern-day technology.

His bombings sparked one of the longest and most expensive investigations in FBI history, with the agency even creating a task force dedicated solely to catching the elusive bomber.

Kaczynski was finally arrested in 1996, after his brother recognized his writing style and behavior in the manifesto he had sent to various media outlets. He later pleaded guilty to all charges and was sentenced to life in prison without the possibility of parole.

His death marks the end of a chapter in American history that sent shockwaves throughout the country for nearly two decades. Despite the horrific nature of his actions, Kaczynski’s legacy lives on as a cautionary tale of the dangerous consequences of extremism.