A young woman with a promising future vanishes from her apartment in the middle of the night; family and friends search desperately for any sign of her, but the truth will only come to light after a grisly crime is committed miles away.

After finishing a midnight shift at a local factory, Fred Matting is murdered in his own driveway; his once peaceful neighborhood turns into a living hell as residents fear that a vicious killer is lying in wait for them.

Working the graveyard shift, a convenience store clerk is on edge after a string of murders are committed within blocks of her store; soon, her worst nightmare becomes a reality when she comes face to face with a serial killer.

A woman's attempt to flee a troubled relationship leads to her demise; police discover a haunting message left behind, but the case goes cold for years until a prime suspect's macabre desire for blood is revealed.

Two young mothers living hundreds of miles apart vanish under eerily similar circumstances; years pass without a single lead in either case until a Missouri police officer's routine house call uncovers an unlikely suspect.

In Allentown, Pa., a serial killer preys on women in the middle of the night; when one woman refuses to be his next victim, the killer goes on a relentless tirade that ends in his own demise.

A gruesome murder puzzles police; a cryptic message is left behind at the crime scene, but the identity of the killer remains a mystery; promises are broken, and old secrets emerge, breathing new life into the investigation.

In Bend, Ore., Halloween night ends with a young woman's disappearance; suspicion of foul play runs deep, but her whereabouts remain a mystery; over time, secrets begin to emerge and lead investigators to the least likely of suspects.

A young college student vanishes; later, a shocking discovery is made, and townspeople begin to question those they once believed were innocent; before long, the truth rises from the dead of night.

In Baton Rouge, La., defense attorney Chiquita Tate is murdered while alone in her office at night; police quickly zero in on a prime suspect until a twisted conspiracy from Tate's past comes to light.

In Baltimore, a predator stalks young women and strikes when they are alone at night; however, one of the killer's victims will turn out to be his worst enemy.

In Great Falls, Mont., police are on high alert after Morris Davis and Suzette Pritchard are brutally murdered just one year apart; one tip will change everything as the police hunt for a killer.

There's a reason murder investigations don't begin with preconceived notions. Sometimes those least expected to be capable of committing such dark deeds -- respected role models and trusted members of the community -- can have a sinister side. "Unusual Suspects" documents baffling, challenging investigations, actual cases that were anything but cut and dry. Episodes feature in-depth interviews with leading law enforcement personnel combined with stylized re-enactments, illustrating how illusive offenders evaded capture for years before being undone by persistent police work.

There are manipulators in the midst, scheming right under everyone's noses. Even with people trusted the most, there may be something sinister lying beneath the surface -- a plot set in motion by someone close with a deadly motive. This true-crime series tells stories of actual murders committed not by strangers but by someone the victim knew, someone hiding in plain sight, or someone leading a double life. These wolves in sheep's clothing use deception as a weapon to try to get away with murder.

Once dubbed "Wonderland" because of its immense summer beauty and grandeur, the rolling mountains and deep forests of the Pacific Northwest become a haven for a series of murders. Using stylized re-enactments and interviews with law enforcement personnel and family and friends of victims, episodes focus on a team of dedicated Portland, Ore., homicide investigators who seek answers to mysterious, disturbing murder cases. In the premiere, Det. Molly Daul realizes she is dealing with a sexual predator, whose chilling confession remains with Molly to this day. The killer then turns his sights on her, raising the stakes even higher.

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.

In classic Investigation Discovery style, "Murder in the Heartland" weaves harrowing narratives of quiet Middle America towns torn apart by provocative crimes. Each town's tale is given life by the combined perspectives of its residents, who are more than just storytellers. The interviewees were also key witnesses to each of the crimes, and they hold critical clues to puzzles that not only have forever changed their lives but how they have come to view their once-idyllic hometowns.

"Accident, Murder, or Suicide" investigates the deaths that are just a little bit too mysterious. It explores the unbelievable true stories in this hourlong program. Each episode retraces the investigation from the start to the end. Investigators take viewers through the twists, turns, and unexpected surprises as they dissect the red flags, show evidence, and point out the strange behavior that puts everything into question.

"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.