Richard Hickock
Richard Hickock was one of the perpetrators of the 1959 Clutter family murders in Kansas, a crime that became widely known through the book "In Cold Blood." Alongside Perry Smith, he carried out the killings during a robbery. Hickock was arrested, convicted, and executed in 1965. The case remains one of the most famous murder cases in American history and significantly influenced true crime literature.
Richard Huckle
Richard Huckle is a convicted child sex offender who confessed to abusing over 200 children during his travels in Southeast Asia
Richard Kuklinski
Richard Kuklinski, also known as The Iceman, is a notorious serial killer.
Richard Matt
Richard Matt is a convicted killer, infamous for his escape from Clinton Correctional Facility in New York and subsequent manhunt in 2015.

Richard Ramirez
Richard Ramirez, known as the “Night Stalker,” was an American serial killer who carried out a series of murders and attacks across California between 1984 and 1985. His crimes were marked by unpredictability, extreme violence, and a lack of a consistent victim profile. Ramirez created widespread fear due to the random nature of his attacks and his ability to evade capture for an extended period. He was later convicted of multiple murders and sentenced to death, becoming one of the most infamous serial killers in U.S. history.

Richard Speck
Richard Benjamin Speck became one of America's most infamous mass murderers after murdering eight student nurses during a single night in Chicago, Illinois, on July 13–14, 1966. The attack at a South Side townhouse generated worldwide attention and became one of the most notorious crimes in American history. Speck was convicted of eight counts of murder and sentenced to death, although his sentence was later commuted to imprisonment following changes to U.S. capital punishment laws. He died in prison in 1991.
Ricky Gray
Ricky Gray was an American serial killer responsible for a series of murders in Virginia in 2006. Alongside an accomplice, he carried out violent attacks on multiple victims. Gray was arrested, convicted, and sentenced to death. He was executed in 2017, with the case drawing attention due to the nature of the crimes and legal challenges surrounding his mental health.
Robert Ben Rhoades
Robert Ben Rhoades is a convicted serial killer known for abducting and murdering multiple hitchhikers throughout the United States.