American kidnappers

Anthony "Tony" George Kiritsis (August 13, 1932 – January 28, 2005) was an American kidnapper.
Kiritsis was a resident of Indianapolis, Indiana, and had fallen behind on mortgage payments for a piece of real estate. In early February 1977, when his mortgage broker Richard O. Hall refused to give him additional time to pay, Kiritsis became convinced that Hall and Hall's father wanted the property. The property's value had increased and could be sold at a high profit. Hall claimed that he had proof of this in writing.

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".

Nathaniel Benjamin Levi Bar-Jonah (born David Paul Brown; February 15, 1957 – April 13, 2008) was an American convicted child molester and suspected cannibalistic serial killer who was sentenced to 130 years in prison without the possibility of parole after being convicted of the kidnapping, aggravated assault, and sexual assault of various children.

Edgar Herbert Smith Jr. (1934 – 2017) was an American convicted murderer sentenced to death for his 1957 killing of 15-year-old Victoria Ann Zielinski in Ramsey, New Jersey. On death row, Smith began corresponding with conservative commentator William F. Buckley Jr., and gradually persuaded Buckley that he was innocent. With the help of an elite legal team retained by Buckley, Smith litigated his conviction through multiple court hearings and wrote a book proclaiming his innocence. In 1971, a federal judge vacated Smith's conviction and ordered a retrial. Smith then took a plea deal to time-served, resulting in his 1971 release. Five years later, Smith abducted and tried to kill another woman in San Diego, California. The victim survived and testified against him in court. During that proceeding Smith admitted killing Zielinski in 1957. He was sentenced to life in prison, where he died in 2017 at age 83.

Gerald Armond Gallego (July 17, 1946 – July 18, 2002) and Charlene Adell Gallego (née Williams; born October 10, 1956) were two American serial killers and rapists who were active mainly in Sacramento, California, between 1978 and 1980. They murdered at least eleven victims, mostly teenagers, often kept as sex slaves before killing them.