People convicted of murder by Kansas

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".

Perry Edward Smith (October 27, 1928 – April 14, 1965) was one of two career criminals convicted of murdering the four members of the Clutter family in Holcomb, Kansas, United States, on November 15, 1959, a crime that was made famous by Truman Capote in his 1966 non-fiction novel In Cold Blood. Along with Richard Hickock, Smith took part in the burglary and multiple murder at the Clutter family farmhouse.