2. Cynthia and Richie Wilder

C.J. Wynn, author of a novel about the case, says that Cynthia and Richie Wilder have not expressed remorse for the murder of Angila Wilder.

3. Alison Martin and Justin Terpstra

Authorities respond to a car fire and find a charred body discarded nearby

4. Laura Martin and Robert Quinn

Just months before his retirement, a missing trucker's body is found in a remote creek; as detectives run out of leads, a seemingly minute detail breathes new life into the investigation revealing two lovers with a nefarious plot.

5. Angelita Reyes and Jesus Jeronimo

When an esteemed California pastor is found executed in an almond orchard, investigators turn to his complex love life for answers.

6. Adrienne Simpson and Tyler Terry

When a crime spree leaves five dead, South Carolina authorities kick start a multi-state investigation to capture a desperate couple on the run.

7. Holly Elkins and Andrew Beard

After a young mother is murdered in broad daylight, Texas authorities are on a hunt for a masked gunman.

8. Brinlee Denison and Nicholas Johnson

A welfare check confirms the worst when a woman is found brutally murdered on her couch.

9. Raquel Garajau and Joseph Villani

When a missing man’s bullet-riddled body is found off the side of a road, police must dig into his complicated past to uncover the truth.

10. Ashley Coleman and Hakeem Griffin-White

When a shocking crime is committed in broad daylight that leaves a young man dead on the street, the investigation uncovers a personal vendetta. In exclusive prison interviews, the killer couple will each share their version of events.

11. Amanda Lothery and Rajhi "T.C." Render

When a young soldier goes missing just two days after his wedding, authorities fear the worst has occurred in their small Ohio town.

12. Anna Schroeder and Rachel Helm

A house fire in a small town in Illinois ignites a homicide investigation after a mother's body is found in her bedroom.

13. Michelle Hetzel and Brandon Bloss

After a teen girl is found dead in the backseat of her own car, detectives focus on the complicated relationships between the victim and the two girls who discovered her body.

14. Devonnee And Malik Wilkerson

A woman's lifeless body is rushed to a hospital in New York after two strangers found her unconscious at a subway station.

15. Melissa Schafer and William Baer

This episode uncovers the harrowing story of a successful businessman who was murdered in his garage during a robbery, witnessed by none other than his wife.

16. Christina Araujo and Zach Abell

After years of being independent in Miami, 31-year-old property manager Aileen Seiden was living happily when she reconnected with an old friend from High School, Zachary Abell.

17. Casandra Nazario And Miles Johnson

When a nurse's aide disappears without a trace, detectives learn she was entangled in a complex love triangle. After a tragic discovery in the woods, the investigation points to a sordid affair and a jealous lover looking for revenge.

18. Linda Buckner and Walter Renz

When authorities learn an Ohio woman has been missing for nearly half a year, all signs point to foul play.

19. Elsa Segura and Lyndon Wiggins

When a Minneapolis realtor is murdered after an attempt on her boyfriend's life, authorities believe the heinous crimes are connected.

20. Raminder Kaur and Baldeo Taneja

When a beloved woman is gunned down in the street near her home, details of a bitter divorce encompass the investigation.