A look at the lives and crimes of Aaron Hernandez, Bison Dele and Steve McNair.

Using vivid first-hand accounts, re-enactments and archival footage to investigate some of the most legendary and intriguing crimes, murders, and scandals that shook the nation and impacted pop culture.

A 12-year-old girl stabbed in the name of a mythical online creature; a 24-year-old man posts his darkest fantasies before slaying three coworkers.

A Hollywood studio executive and devoted family man vanishes into thin air one night; as investigators dig into the case, they uncover dark secrets, and the details of man living a double life.

In 1979, Steve Banerjee cofounds the Chippendales male revue; as the franchise grows into an empire that generates vast sums of revenue, Banerjee does anything to protect it, including murder.

Richard Ramirez is a satanic killer who sexually assaults his victims; Aileen Wuornos, a highway hooker with a gun; Doug Clark and Carol Bundy prowl the Sunset Strip for sex and victims.

In 1977, aspiring actress Christa Helm gets murdered in West Hollywood; she becomes known for her secret diary, detailing romantic encounters with celebrities; her death remains one of Hollywood's greatest mysteries.

When obsession meets celebrity, the results can be fatal; rising music star Christina Grimmie is gunned down by a crazed fan; singer Bjork survives a bizarre plot by a man who takes his own life.

In 1981, four people are found brutally murdered in the Hollywood Hills; the story of this horrific crime involves a prolific adult film star, a prominent LA nightclub owner, and the teenage girl caught between them.

Fame at any age can make someone feel invincible, but young stars can lose control; Johnny Lewis ("Sons of Anarchy"), Lillo Brancato Jr. ("The Sopranos") and Ricardo Medina ("Power Rangers") are profiled.

Using vivid first-hand accounts, re-enactments and archival footage to investigate some of the most legendary and intriguing crimes, murders, and scandals that shook the nation and impacted pop culture.

Using vivid first-hand accounts, re-enactments and archival footage to investigate some of the most legendary and intriguing crimes, murders, and scandals that shook the nation and impacted pop culture.

Using vivid first-hand accounts, re-enactments and archival footage to investigate some of the most legendary and intriguing crimes, murders, and scandals that shook the nation and impacted pop culture.

Using vivid first-hand accounts, re-enactments and archival footage to investigate some of the most legendary and intriguing crimes, murders, and scandals that shook the nation and impacted pop culture.

Using vivid first-hand accounts, re-enactments and archival footage to investigate some of the most legendary and intriguing crimes, murders, and scandals that shook the nation and impacted pop culture.

Using vivid first-hand accounts, re-enactments and archival footage to investigate some of the most legendary and intriguing crimes, murders, and scandals that shook the nation and impacted pop culture.

Using vivid first-hand accounts, re-enactments and archival footage to investigate some of the most legendary and intriguing crimes, murders, and scandals that shook the nation and impacted pop culture.

"The Turpin 13: Family Secrets Exposed" is a two hour special hosted by Emmy and Peabody Award-winning journalist Soledad O'Brien. The program gives viewers an in-depth look into the story surrounding David and Louise Turpin and their 13 children. O'Brien retraces the family's past -- and present -- to see just how far back the secret of the alleged abuse has been going on and how it was kept hidden for so long. Multiple red flags are raised in the form of financial woes, abandoned homes, and unspoken concern from neighbors. Soledad O'Brien brings to light the stories of Louise's sister Teresa Robinette, half-brother Billy Lambert and some of the neighbors.

Wondering how the events really happened, HLN's original series revisits and reveals new answers to notorious crimes, mysteries, trials, and celebrity tragedies. The premiere delves into the sensational trial of brothers Lyle and Erik Menendez, including the shocking motive for the brutal murders of their wealthy parents. From there, episodes dissect new clues and re-examine conspiracy theories connected to, among others, the John F. Kennedy Jr. plane crash, the deaths of music royalty Prince, Michael Jackson and Whitney Houston, and the FBI's investigation of "Unabomber" Ted Kaczynski. Included are fresh accounts from witnesses who speak publicly about the cases for the first time. Actor Hill Harper, best known for his role on "CSI: NY," hosts.

Eagle-eyed technical experts prove there is no such thing as a perfect crime as they assemble the pieces every criminal leaves behind. Dramatic crime re-creations and, sometimes, part of the investigations are a staple of the series. Some of the re-creations include alternate versions of the crimes, which are disproved by science. The show's episodes follow each case from the initial investigation until it reaches its legal resolution.

Hundreds of homicide cases in any given year can shake even the staunchest cities and police departments to the core. The statistics, however, don't paint the real stories and the effect that lingers -- through the pain endured by victims' loved ones, the community impact, and the memories that detectives will never forget. "Homicide City" explores unforgettable murder cases from major American cities, investigations that had law enforcement banding together across metropolitan landscapes in a sequence of manhunts. Each story is told by veteran homicide detectives, local reporters, and the victims' families.

"Betrayed" reveals chilling stories of chasing the American dream and how the veneer can dramatically crumble, ending in murder at the hands of a trusted family member, co-worker, lover, or friend. The cases of deception are told through the lens of the fictionalized, first-person perspectives of the victims. As investigators, family, and friends peel back the layers and facts of each case, the otherworldly narrator already knows where the trail ends. The narrator guides viewers through various relationships, raising suspicions about who will commit the ultimate betrayal.

The holiday season between Thanksgiving and New Year's is often thought of as a celebratory period to spend time with friends and family. That is not always the case, though, as the period is not immune from experiencing the same types of violent crimes that occur throughout the year. This series documents stories of tragedy that struck during the holidays, with firsthand accounts from people who had friends or family members killed during the joyous time. Sometimes the victim is killed by someone close to them, such as a case of sibling rivalry turned deadly, but sometimes the killing is done by a stranger who interrupts a holiday gathering with gunfire.