From a brilliant mathematician and an assistant professor at University of California, Theodore Kaczynski became the notorious American criminal—Unabomber—who was responsible for mail bombs that killed three people and injured 23 in eighteen years. He was eventually caught and sentenced to life imprisonment after his anti-technology essay sent to the media was recognised by his brother.
A Gulf War veteran, Timothy McVeigh made headlines after carrying out the Oklahoma City bombing that killed 168 people. He defended his actions saying that he wanted to inspire a revolution against what he considered a tyrannical government. The bombing remains the most malignant act of domestic terrorism in American history. He was executed by lethal injection in 2001.
A mobster and drug dealer most wanted by India, Dawood Ibrahim heads the organized crime syndicate popularluy known as D-Company. He was named No.3 on The World's 10 Most Wanted Fugitives by the FBI in 2011. He is wanted on the charges of terrorism, murder, targeted killing, extortion, and drug trafficking among other crimes.
Khalid Sheikh Mohammed is a Pakistani terrorist, who is believed to be “the principal architect of the 9/11 attacks.” A member of Osama bin Laden's al-Qaeda organization, he led al-Qaeda's propaganda operations for a few years. He is known by at least fifty pseudonyms. He was captured in 2003 and is currently detained at the Guantanamo Bay detention camp.
12 Dokka Umarov
Chechen separatist Dokka Umarov later declared himself the emir of the Islamic Caucasus Emirate. Though a civil engineer by profession, he continued to indulge in criminal activities while working in Russia. He was eventually poisoned, and his body was found in a remote Russian area.
Mullah Krekar is an Islamic scholar and militant. He is credited with founding an Islamist armed group named Ansar al-Islam. Interestingly, he claimed that he was not aware of the various terrorist attacks organized by Ansar al-Islam. He is currently serving his sentence in an Italian prison after having been deported to Italy from Norway in 2020.