Gina Tron

Cedar Park Police Officer Chris Dailey has been criticized in the Greg Kelley case for not thoroughly investigating all suspects in the case.

Construction business owner Jake Brydon told Oxygen.com that he felt a calling to help Greg Kelley, a teen convicted of molesting a child.

After Shawn Dick became district attorney of Williamson County, he spoke out publicly about his office's past mistakes, including the wrongful prosecution of former high school football star Greg Kelley for child sex abuse.

As explored in Netflix's "Unsolved Mysteries" reboot, Count Xavier Dupont De Ligonnès is suspected of executing his wife and four children in 2011 before fleeing his home in Nantes. He's never been found.

Aaron Glee Jr., who is accused of killing Victoria Sims and Black Lives Matter activist Oluwatoyin Salau, exhibited signs consistent with serial killers, according to expert observers.

Billy McFarland had unsuccessfully sought an early release from prison, citing worries that his asthma would make him particularly susceptible to the novel coronavirus' dangerous effects.

Michelle McNamara, author of "I'll Be Gone in the Dark," wrote that her obsession with true crime began with a still-unsolved killing.

More than 300 children said they were sexually abused by employees at the McMartin Preschool in California, including Ray Buckey, but questions about investigators' interviewing techniques quickly came to the fore.

Patrice Endres vanished from her salon around lunchtime over a decade ago — where two witnesses may have seen something pivotal to solving the case. 

Ghislaine Maxwell is accused of recruiting underage victims for Jeffrey Epstein and had spent much of the last year in hiding.