Terry Lynn Nichols (born April 1, 1955) is a convicted accomplice in the Oklahoma City bombing. Prior to his incarceration, he held a variety of short-term jobs, working as a farmer, grain elevator manager, real estate salesman and ranch hand. He met his future co-conspirator, Timothy McVeigh, during a brief stint in the U.S. Army, which ended in 1989 when he requested a hardship discharge after less than one year of service. In 1994 and 1995, he conspired with McVeigh in the planning and preparation of the Oklahoma City bombing – the truck bombing of the Alfred P. Murrah Federal Building in Oklahoma City, Oklahoma, on April 19, 1995. The bombing claimed the lives of 168 people, including 19 children.

After a federal trial in 1997, Nichols was convicted of conspiracy to use a weapon of mass destruction and eight counts of involuntary manslaughter for killing federal law enforcement personnel. He was sentenced to life imprisonment without the possibility of parole because the jury deadlocked on the death penalty. He was also tried in Oklahoma on state charges of murder in connection with the bombing. He was convicted in 2004 of 161 counts of first degree murder, including one count of fetal homicide; first-degree arson; and conspiracy. As in the federal trial, the state jury deadlocked on imposing the death penalty. He was sentenced to 161 consecutive life terms without the possibility of parole, and is incarcerated in ADX Florence, a super maximum security prison in Florence, Colorado. He shares a cell block that is commonly referred to as "Bombers Row" with Ramzi Yousef and Ted Kaczynski.

Timothy James McVeigh (April 23, 1968 – June 11, 2001) was a United States Army veteran and security guard who detonated a truck bomb in front of the Alfred P. Murrah Federal Building in Oklahoma City on April 19, 1995. Commonly referred to as the Oklahoma City Bombing, the attack killed 168 people and injured over 800 people, and was the deadliest act of terrorism within the United States prior to the September 11, 2001 attacks. McVeigh, a militia movement sympathizer, sought revenge against the federal government for its handling of the Waco Siege, which had ended in the deaths of 76 people exactly two years prior to the bombing, as well as for the Ruby Ridge incident in 1992. McVeigh hoped to inspire a revolt against what he considered to be a tyrannical federal government. He was convicted of 11 federal offenses and sentenced to death. His execution took place on June 11, 2001 at the Federal Correctional Complex in Terre Haute, Indiana. Terry Nichols and Michael Fortier were also convicted as conspirators in the plot.

Marion "Suge" Knight, Jr. ( /ˈʃʊɡ/; born April 19, 1965) (a.k.a. Big Suge or Big Simon) is the founder and CEO of Black Kapital Records and co-founder and former CEO of Death Row Records. Death Row Records rose to dominate the rap charts after Dr. Dre's breakthrough album The Chronic in 1992. After several years of chart successes for artists including Tupac Shakur, Dr. Dre, Snoop Dogg, Outlawz, and Tha Dogg Pound, Death Row Records stagnated after Knight's incarceration on parole violation charges in September 1996.

Marion Hugh Knight was born in Compton, California. His name, Suge, derives from "Sugar Bear", a childhood nickname. He attended Lynwood High School, then graduated and got a football scholarship to University of Nevada, Las Vegas, where he went and played football for several years. After school, he played professionally for the Los Angeles Rams as a replacement player during the 1987 NFL strike. Later, he found work as a concert promoter and a bodyguard for celebrities including Bobby Brown.

Theodore John "Ted" Kaczynski ( /kəˈzɪnski/ ka-ZIN-skee, or ka-CHIN-skee; Polish: Kaczyński, pronounced [kaˈt͡ʂɨȷ̃skʲi]; born May 22, 1942), also known as the "Unabomber" (a portmanteau of UNiversity and Airline BOMBER), is an American mathematician, social critic, and Neo-Luddite who engaged in a mail bombing campaign that spanned nearly 20 years, killing three people and injuring 23 others.

Kaczynski was born in Chicago, Illinois, where, as an intellectual child prodigy, he excelled academically from an early age. Kaczynski was accepted into Harvard University at the age of 16, where he earned an undergraduate degree, and later earned a PhD in mathematics from the University of Michigan. He became an assistant professor at the University of California, Berkeley at age 25, but resigned two years later.

In 1971, he moved to a remote cabin without electricity or running water, in Lincoln, Montana, where he lived as a recluse while learning survival skills in an attempt to become self-sufficient. He decided to start a bombing campaign after watching the wilderness around his home being destroyed by development. From 1978 to 1995, Kaczynski sent 16 bombs to targets including universities and airlines, killing 3 people and injuring 23. Kaczynski sent a letter to The New York Times on April 24, 1995 and promised "to desist from terrorism" if the Times or The Washington Post published his manifesto, Industrial Society and Its Future (also called the "Unabomber Manifesto"), in which he argued that his bombings were extreme but necessary to attract attention to the erosion of human freedom necessitated by modern technologies requiring large-scale organization.