Joe and Shawndrea follow up on a handful of Phoenix sightings since her disappearance and begin to question whether she'd been lured into a new life more dangerous than she could have anticipated; a surprising lead goes to an unexpected locale.

Phoenix Coldon vanishes; investigative reporter, Shawndrea Thomas, and retired deputy Police Chief Joe Delia attempt to unravel the mysterious unsolved case in the hope of finding justice for Phoenix.

Think "Cold Case" meets "CSI" with a bit of "Rizzoli & Isles" mixed in, then make it real. That's the formula for this unscripted procedural drama that follows two veteran female investigators as they attempt to crack murder cases that have lingered for years without answers and closure. Kelly Siegler is an attorney and former Texas prosecutor who successfully tried 68 murder cases in her 21 years on the job, including 20 capital murder death penalty cases in which she secured the death penalty in 19 of those trials. She gets help from veteran detectives, who dig into small-town murder cases that have gone unsolved for years in the hope of getting justice for the victims and their loved ones.

"Killer Couples" is in the same vein of the long-running true-crime series "Snapped," which tells stories of people who commit murder or attempt murder, but with a focus on couples who commit crimes. Using re-creations and firsthand accounts, each episode digs into a case, telling the story of the couple's romance, how the relationship evolved from love to manipulation, and what ultimately led the couple to commit the crime. The stories range from teenage lovers who go on a multistate crime spree to lesbian lovers who want to eliminate one of their husbands.

For more than 25 years, "Dateline" has brought viewers investigations into some of biggest mysteries in America. This entry in the franchise takes a second look at some of the most mysterious cases of recent history. Hosted by Emmy-winning journalist Craig Melvin, the show explores the stories through firsthand accounts told by people who are close to the crime, including investigators who dedicated their time to the cases and family members who are still trying to confront the tragedies that befell their loved ones.

Social media was in its infancy in 2004, but the explosion in its popularity in the years since then has kept alive a missing-person case. Nursing student Maura Murray vanished in February 2004 after witnesses heard what sounded like a car crash. The case has led a legion of armchair detectives to come up with their own theories about the apparent crime on blogs, websites and podcasts. In this series, investigative journalist Maggie Freleng tries to unravel a slew of unexplored leads, eyewitness discrepancies and missing evidence that have cropped up online. She receives rare access to Maura's family and friends and talks with people who have dedicated countless hours to searching for the truth in the case. Freleng retraces Maura's last-known steps to try to find out what really happened and tackle the unanswered questions that remain -- perhaps most importantly, did Maura choose to disappear or was she a victim of foul play?

A vibrant young woman is found dead, hanging naked, bound and gagged, in the courtyard of her billionaire boyfriend's Coronado, Calif., mansion, just two days after his 6-year-old son suffered a shocking accident. The sheriff rules her death a suicide, claiming she was distraught over the young boy's grim prognosis, but after seven years of endless public intrigue and speculation, a wrongful death suit holds someone accountable. In the wake of the civil verdict, Prosecutor Loni Coombs, crime journalist Billy Jensen, and forensic criminologist Paul Holes embark on a fresh look at the case. Meeting with experts, family members, witnesses, and never-before-interviewed law enforcement officials, they create a case file with compelling new evidence and present it to the San Diego Sheriff's Office for review.

Desperation can cause people to do extreme things. When its paired with obsession and an overwhelming need to belong, it can prove to be fatal. When individuals are pushed beyond their limits -- when their exclusivity to the finer things in life, status, and accessibility to belong are threatened -- some crimes can be fatal. Through firsthand testimony and never before seen video footage, "Dying to Belong" draws the curtain back on a community where distrust, rivalries, and the threat of losing everything can lead to extreme measures and actions, no matter what.

On May 30, 2005, 18-year-old Natalee Holloway disappeared on the island of Aruba. Her case resulted in a worldwide media frenzy, yet Natalee's body was never found, and her father, Dave Holloway, has never stopped searching for answers. Now, 12 years later, he's following what he believes to be the most credible lead to date: a detailed firsthand account from a man who claims to know the whereabouts of his daughter's remains, and the hope of finally getting a conviction of Joran van der Sloot. This true crime series follows Dave and T.J. Ward, the family's longtime private investigator, in the latest and perhaps final chapter of the decade-long pursuit to uncover what really happened to Natalee.