An Arkansas man with his own security firm is found dead on a deserted road, leaving behind his daughter to pick up the pieces; 13 years later, the victim's daughter finds clues when another murder occurs.

A murder victim's family struggles with grief and finding out what really happened uncovers secrets that change everything they thought they knew, and a truth far more sinister emerges.

A disabled man is found shot to death in a public restroom; detectives uncover worrisome details.

A loving daughter lives with secrets and unanswered questions ever since the murder of her father decades ago; an investigation into the death ultimately reveals that her father was living a double life.

A woman falls head over heels and marries a charming man, but she soon realizes she got more than she bargained for, so she undertakes her own investigation to find out who she really married.

A series of mysterious deaths have plagued a small community in Kansas; the thorough investigation of one determined detective reveals a sinister plot and proves that if it takes a village to raise a family, it only takes one person to destroy it.

Rod Demery's destiny was sealed at the age of 3. That's when his mother was murdered, and Demery would come to realize that he wanted to protect people who couldn't protect themselves. He did so by serving for 14 years as a Shreveport, La., homicide detective, working on more than 250 cases and solving each of the 60-plus investigations on which he was lead detective. In "Murder Chose Me," Demery reflects on his stellar career, guiding viewers through first-person storytelling that weaves his uniquely tragic personal connection to the story of each homicide he solved.

"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.

Veteran journalist María Elena Salinas has made a name for herself in the Spanish-speaking community as a longtime news anchor on Univision. In this series, she goes from reporting the news to investigating it as she goes beyond the headlines to uncover the truth about headline-making crimes. Salinas attempts to remove the clutter that surrounds cases that were in the media spotlight and find information that the media originally missed when reporting on the stories as they were happening. In her searches, Salinas finds new evidence, gets previously unheard perspectives and provides updates to the cases.

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.

Never forgetting what happened to loved ones who have been murdered is a way of paying respect, however horrifying and raw those memories may be. The recollections can come in handy too, like when they contain critical clues that help detectives piece together the final hours of the victim's life. This series examines that aspect of homicide cases, with each hourlong story told through the memories of family members, friends, and investigators, plus images from the time of the crime that still haunt and are unforgettable.

Stories written by the British crime novelist.

"Vanished into thin air" is an oft-used phrase to describe how people disappear suddenly and completely. "Gone" accomplishes the same thing, albeit in a more succinct, abrupt way, and provides Investigation Discovery with perfect true-crime fodder. The network introduces the hourlong series thusly: "No shoes in the hall. No coffee in the pot. He was supposed to come in late, but when she woke that morning he was just gone. As the day went on, her unanswered calls grew more frantic, and her unease became panic. Something was wrong but the truth is even darker than it looks." What follows are stories of missing people who leave a trail of secrets -- and distraught loved ones with mysterious pasts -- in their wake.

No matter how complicated or seemingly straightforward a murder investigation may be, experienced law enforcement personnel always employ tried and tested methods to catch their prey. Documenting witness statements, pouring over forensic reports and crime scene photos, nailing down the timeline, and keeping an open mind about the causes and possible perpetrators of a crime are essential to an investigator's success. "Six Degrees of Murder" delves into another essential element that could be the difference between a solved case and a cold one. Featuring stylized re-enactments, each hourlong episode details how investigators untangled a complicated web of relationships before cracking a murder case.

Investigation Discovery's true-crime storytelling is often rooted in its award-winning visuals, but it's audio from actual 911 calls that sets the tone in "Murder Calls." Each hourlong episode tracks a criminal investigation in which detectives must decipher the contents and subtext of an emergency call. As the case moves forward, the 911 audio ultimately leads investigators to the truth.

Crimes and mysteries are investigated.