Sara Kettler

The ex-police sergeant was convicted of killing his third wife and is currently in prison, but hasn't been charged in the disappearance of Stacy Peterson, his fourth wife.

Hired in 1921, James E. Amos was the first Black agent to work publicly for the FBI and worked high-profile cases involving murder, organized crime, Nazi spies and more during his 30-plus years of service.

The 1980s McMartin Preschool case was, and currently remains, the longest and most expensive criminal trial in American history. Seven teachers at the school were accused of abusing hundreds of students, sometimes as part of Satanic rituals.

In 2017, the investigation of a missing 20-year-old Indigenous woman from the Blackfeet Indian Reservation in Montana stalled, which resulted in it remaining unsolved today.

On July 29, 1994, 7-year-old Megan Kanka was killed by Jesse Timmendequas, a convicted sex offender who lived across the street.

On January 13, 1992, the serial killer changed his plea from not guilty to guilty but insane, which removed the need for a criminal trial and forced the verdict to be based on the jury's decision of his mental state.

Scott Peterson, who was found guilty of the murders of his wife, Laci Peterson, and their unborn son, on November 12, 2004, was at San Quentin State Prison but in 2022 was transferred to Mule Creek State Prison while his family fights for a new trial.

In 1996 serial killer Ivan Milat received life sentences for the murders of seven missing backpackers found dead in Australia's Belanglo State Forest. Over a decade later, his great-nephew committed a murder and credited it to his family name.