Investigation Discovery HD

The smart, ambitious kids rule a Warren, Mich., high school, and two of the best and brightest are seniors Danyna Gibson and Tanaya Lewis; when these straight-A students compete for more than just grades, the results turn deadly.

After Ohioan Richard Beasley vanishes, police discover that an online monster has been luring local men to their deaths.

After a taping of their local-access TV show, Chrissy and Charlie Billis have a terrible accident, smashing their car into a tree; only one of them survives, but tapes from the couple's TV show suggest a sinister tale behind what really happened.

In 2014, the scorched remains of a house fire reveal two female victims, Robin Aldridge, 58, and her daughter, Mani, 17; when investigators dig deeper into the women's lives, they uncover a secret online relationship that led to tragedy.

A kind and well-liked husband and father, Tom Bragg, is found brutally murdered; his community struggles to think who wanted him dead.

When 23-year-old Whitney Bennett goes missing, her disappearance is a mystery; no-one understands why this popular young woman would leave her home or children.

The bullet-riddled body of 19-year-old college student Amanda Anderson is found by her sibling, Nate; with few leads, J.B., Pamela and Joe spring into action; ultimately, it is a crime-scene detail that leads to the case's shocking conclusion.

Detective Pam Dunklin's first homicide as the lead investigator begins one balmy summer afternoon when bartender Jeff Joplin is found beaten, strangled and stabbed to death on the floor of his home near Horseshoe Lake in Smith County, Texas.

A woman begs Detective Joe Rasco to reopen the 1982 unsolved murder of her cousin, Catheryn Powell; in doing so, he discovers a case filled with fake leads, dead ends and false confessions.

After his conviction for the brutal slaying of his wife, a Florida inmate lays claim to another unsolved murder 17 years prior, revealing that he's a manipulative psychopath with a history of violence and an unquenchable thirst for revenge.

A mother who calls 911 to report her 32-year-old son is threatening her turns up dead in her home; he becomes the only suspect, and when he turns himself in, his pragmatic retelling of the slaying isn't just cold-hearted, it's psychopathic.

When a priest from Florida goes missing, police focus on a troubled ex-convict whom he helped support; through multiple interrogations, a psychopathic killer reveals details of a twisted vengeance that escalates to a chilling murder.

Searchers for a missing woman find her brutally beaten body in a dilapidated house near her home; the case goes cold until a local teen steps forward to reveal that he's the killer.

Host Donnie Wahlberg delves into the notorious crimes of Keith Hunter Jesperson, a serial killer in the 1990s, who drew smiley faces on his confession letters to local authorities.

A happy face is supposed to be a joyful symbol, unless it's on a letter from a killer.

The cops wonder if a series of deaths means a black widow is spinning her web.

The cops wonder if a series of deaths means a black widow is spinning her web.

The only thing scarier than a serial killer is one hiding in plain sight.

The only thing scarier than a serial killer is one hiding in plain sight.

Christian Fuhr receives a life sentence, and his girlfriend, Ammie Turos, believes he is innocent; when she discovers he's guilty, her conviction is replaced by uncertainty, and she wonders if her life had been in danger the entire time.

A recently divorced woman meets a kind, caring, and nurturing father. Despite her reservations against getting into a new relationship, she falls in love. However, she doesn't see what everyone else around her sees - that he is a killer.

The story of the DC Sniper and Mildred Muhammad; her testimony reveals it was part of a calculated plan rooted in manipulation, control, and domestic abuse driven by a single, dark obsession.

A recently divorced woman meets a kind, caring, and nurturing father. Despite her reservations against getting into a new relationship, she falls in love. However, she doesn't see what everyone else around her sees - that he is a killer.