Julius Wilford "Nicky" Arnstein (born Arndstein; July 1, 1879 – October 2, 1965) was an American professional gambler and con artist. He was known primarily as Julius Arnold, but among his aliases were "Jules Arndtsteyn", "Nick Arnold," "Nicholas Arnold", "Wallace Ames", "John Adams", and "J. Willard Adair". He was best known as the second husband of entertainer Fanny Brice.
Benjamin Hoskins Paddock Jr. (November 1, 1926 – January 18, 1998) was an American bank robber and con man who was on the FBI Ten Most Wanted Fugitives list from 1969 to 1977. He was the father of mass murderer Stephen Paddock, the perpetrator of the 2017 Las Vegas shooting.
John Edward Robinson (born December 27, 1943), also known as the Slavemaster, is an American serial killer, con man, embezzler, kidnapper, and forger who was found guilty in 2003 for three murders committed in and around Kansas City, receiving the death penalty for two of them. In 2005, he accepted responsibility for five further homicides in Missouri as part of a plea bargain to receive multiple life sentences without possibility of parole and avoid more death sentences. Investigators suspect that more victims remain undiscovered. Because he made contact with most of his post-1993 victims via online chatrooms, Robinson is sometimes referred to as "the Internet's first serial killer".