John Edward Robinson, 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".

Christopher Andrew Koster is an American lawyer and politician who served as the 41st Attorney General of Missouri from 2009 to 2017. Before that, Koster was elected three times as prosecuting attorney of Cass County, Missouri, and served four years as state senator from Missouri's 31st Senatorial district.