The Complexities help us most with identifying The Unabomber as a serious suspect. The reason there are so many more relations is because the intervening time has increased our knowledge of the Unabomber as the FBI released information about the bombs he made, his manifestos and his victims.
Here is the list:
The Unabomber built bombs including pipe bombs and fire bombs.
The bombs were not all mail bombs. Some were placed rather than delivered in the mail.
The bombs did not always work completely.
The bombs included wood in the construction.
The Unabomber sent notes and manifestos to newspapers and to other media.
There was misdirection in each one.
There were false clues. He left fingerprints from someone other than himself and identifying marks to mislead investigators.
He bombed every three years or less.
He bombed in 1987.
He bombed in 1993 next, according to the FBI. In 1996, in a letter to the NYT the Unabomber is quoted as saying, “Our early bombs were too ineffectual to attract much public attention or give encouragement to those who hate the system,” he wrote in a letter to the New York Times last April, a few days after the bombing of the Oklahoma City federal building eclipsed everything he had done. Striving for renewed attention, he said he had taken “a couple of years off to do some experimenting. We learned how to make pipe bombs that were powerful enough, and we used these in a couple of successful bombings as well as in some unsuccessful ones,” he said.
1990 is right in the middle of his time off.
He used a typewriter and capital letters ungramatically.
He used a Corona.
Quotes from sources
Throughout the manuscript, produced on a typewriter without the capacity for italics, Kaczynski capitalizes entire words in order to show emphasis. He always refers to himself as either “we” or “FC” (Freedom Club), though there is no evidence that he worked with others. Donald Foster, who analyzed the writing at the request of Kaczynski’s defense, notes that the manuscript contains instances of irregular spelling and hyphenation, as well as other consistent linguistic idiosyncrasies (which led him to conclude that it was indeed Kaczynski who wrote it). [wiki]
Note: Kaczynski used a one gallon can of gasoline attached to a pipe bomb in his July 2, 1982 bombing at the University of California and in numerous bombs he used nails, tacks, wood splinters and pieces of lead to act as shrapnel, (mutilation of victims was a big high for him) and he is the only bomber who is a writer who also used booby trap-bombs many times and the bomb that almost killed Judi Bari was an anti-personal booby trap bomb. From McLaughlin, Death Squads.
Mercifully, the bombings stopped for more than six years. Some investigators speculated Kaczynski had been scared off after he’d been seen, and a sketch of the Unabomber had circulated. Others came up with any number of theories — including one that the Unabomber had discovered religion.
Here is the first page of the Lord’s Avenger letter for comparison: