Film director Adrienne Shelly is discovered hanging by a bed sheet from the shower rod in her bathroom; while Shelly's death looks like a suicide, her husband insists it was murder, and detectives start to believe him.

Ann Anastasi returns home from shopping to find her husband, Anthony, lifeless in bed, a gun beside him; police soon find a second victim, Jacqueline Riggs, in the basement; later, they discover a dark tale of love, lust and violence.

Randy Scheffield's family finds him dead in his bed and assumes he has succumbed to a heart attack, but detectives slowly uncover a murder conspiracy that will rock Scheffield's small town for years to come.

A freak car accident brings a Belgian honeymoon to a tragic end, and the investigation leads police down a rabbit hole and culminates in an international manhunt for a killer.

Hollywood golden boy Gavin Smith, a 20th Century Fox executive and former star UCLA basketball player, goes missing; for years, his family and detectives search tirelessly for answers, but a group of heartless characters hold fast to their secrets.

University of Miami football player Marlin Barnes and his friend, Timwanika Lumpkins, are beaten to death in Barnes' apartment; as detectives search for the vicious killer, the crime sends shock waves through the campus and community.

Atlanta preschool teacher Julie Love goes missing just a week after getting engaged to boyfriend Mark; detectives find numerous suspects in the teacher's disappearance, but the truth turns out to be far worse than they could have imagined.

Twenty-six-year-old car dealer Christopher O'Brien takes a stranger for a test drive and never returns; investigators wonder whether O'Brien's criminal past has caught up with him.

After 39-year-old Dawn Viens goes missing, her chef husband, David, reports she ran away to escape her problems; the investigation leads detectives to an unexpected killer who disposed of Viens' body in an unimaginable way.

Pro football player Sean Taylor is shot dead by an intruder in his Miami home.

When Nancy Lyon dies of a mysterious illness in 1991, her wealthy father tells police she was poisoned by her own husband.

Peter Theriault, 51, has never missed a day of work in nearly 30 years, then he fails to arrive for his shift at a car plant in Commerce City, Calif.; his family and friends immediately suspect that something is very wrong.

Multi-millionaire Las Vegas real estate developer Ron Rudin goes missing; to find him, detectives trace twisted a path filled with haunting spirits, dark obsession and greed.

When Robert Schwartz, a father of three, dies in a brutal murder in his own home made to look like a ritualistic killing, the investigation uncovers a killer much closer to home.

After New York City fashion photographer Joel Schoenfeld is shot dead in his Greenwich Village studio, detectives uncover a dark secret and a twisted tale of revenge.

When a woman finds her daughter strangled to death in their Staten Island, N.Y., home, computer technicians uncover a dangerous online dating habit, but the real killer lies much closer to home.

When a woman is murdered in Milwaukee, her sons describe a masked man with a ponytail fleeing from the home, and police investigate the victim's rancorous ex-husband and a neighbor who claims his gun was stolen.

In Bronx, N.Y., police investigate the murder of 20-year-old Kimberly Antonakos who was set ablaze while still alive.

An intruder shoots Daniel Ott dead with a shotgun in a stunning case of mistaken identity that leads investigators into the heart of one of the most dangerous criminal rings in the country.

A car races up to the emergency room doors at a Mount Kisco, N.Y., hospital; driver Carlos Perez-Olivo has been shot in his side, while wife Peggy has been shot in the head; investigators must determine what horror has befallen this couple.

Diane Girts is found dead in the bathtub of her home adjoining her husband's funeral home, and investigators cannot determine exactly how she died; as the case unfolds, detectives uncover troubling clues pointing to a cunning and dangerous killer.

Maybe it's the jealous ex, the co-worker seeking revenge, or perhaps a predator with an appetite for blood? Whatever the motives, crimes are most often solved by relentless investigators searching for the truth and following clues wherever they may lead. This series explores the emotional stories of those attempting to find closure in homicide investigations, from the victims' families to the dedicated police officers. Hourlong episodes present compelling versions of what may have happened and stylized re-enactments of events from different perspectives as new evidence emerges.

From the moment a homicide is reported, a file is assembled to document every facet of the investigation -- crime scene photos, notes and observations, forensic reports, witness interviews, suspect profiles -- and continues to grow with new information until an arrest is made and conviction attained. Investigation Discovery opens these "murder books" to tell haunting tales buried within the pages. Hourlong episodes take viewers back in time with details of decades-old cold cases using actual archival footage, crime-scene evidence and first-person interviews with lead investigators, unraveling the mystery and uncovering what broke the cases open.

Some of the world's most notorious murders are the subject of "It Takes a Killer," which investigates the crimes from the perspective of the killers, trying to get inside their minds and determine their motives. Leading homicide investigators and experts from such agencies as the FBI and Scotland Yard take a look at the evidence pulled from crime scenes and profile the killer's behavior to try to piece together the details of each murder, explaining when, why and how each criminal committed the crime. For the wannabe detectives watching the show, the experts also reveal how the crime was solved -- which often requires authorities to think like a killer.

"Who Killed Jane Doe?" presents a unique journey of discovery, loss, mystery and resolution. Featuring Investigation Discovery's distinctive stylized re-enactments, each hourlong episode weaves together two parallel stories: that of detectives who gather clues to identify a victim and the manner of death, and that of a family who knows very well who the victim is and is struggling to find her. The emotional tales honor the nameless and offer a final resting place to a missing loved one.

Not every murder scene leaves behind clues in the form of bloody footprints, clothing fibers or fingerprint stains. Investigators earn their reputations by discovering evidence other than what is easy to see. This series spotlights devoted investigators who "go beyond the headlines," incorporating cutting-edge science to find the tiniest trace evidence and understand its relevance. The forensics-driven stories are told via stylized re-enactments, showing how the best investigators work to decipher which clues mean nothing and which ones will put a killer behind bars, all to bring justice to victims' loved ones.

While most killers act alone, there's another type of murder that happens less frequently yet still produces horrific consequences. That's when people decide to kill as a group. This Investigation Discovery series details true-crime cases that involve victims who have been savagely murdered by their own friends. Stylized re-enactments featuring first-person accounts from law enforcement personnel and friends and family of the victims accompany each story.

"Beyond the boundaries of ordinary life, there is another world that lies just outside of town, where places have no names." That's Investigation Discovery's introduction to "Murder Comes to Town," a true-crime series that reveals what can happen in solitary and desolate places. Hourlong episodes feature gripping tales of betrayal and murder buttressed by re-enactments and interviews with friends, family, and neighbors of the deceased, plus law enforcement personnel.