This harrowing half-hour archive series revisits some of the most brutal killers in modern history, reviewing news footage and the words of the killers themselves to see which terrifying traits each killer exhibited. What are the signs...of evil?

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.

Incorporating bodycam footage from the initial crime scene, surveillance video, and interrogation room recordings, homicide investigations unfold through dramatic real video footage providing an up-close perspective on homicide investigations.

Stories of murder investigations that gradually exposed one truth after another, revealing the sinister underbelly beneath seemingly placid communities.

The stories of real people who are tormented by the past and take extreme measures to solve the murders of loved ones.

The most outrageous and provocative crimes ever committed by sisters, who sometimes work together and sometimes turn against each other.

In "Impact of Murder," Investigation Discovery uses the victim impact statement as a storytelling device. These statements are delivered in court allowing a family member or friend to describe the impact of a crime. They are a source of strength for those who feel helpless in the face of a senseless crime, and they help crime victims recover from the collateral damage inflicted, giving them a sense of power as they stand up in court to address the perpetrator. Through the victim's words, viewers come to understand the emotional damage endured as well as the significance of the life that was taken.

Stories of baffling murder cases in which the “murder wall” plays a crucial part in solving the crime. The ever growing murder wall evolves throughout the show as new pieces of evidence, new witnesses and new clues are found. Some leads go nowhere, others prompt the vital leaps of imagination that help the cops to crack the case.

Each episode re-examines a single crime case where unanswered questions still remain. Through original interviews those involved, the evidence is dissected and new theories are presented in a quest to uncover the truth.

True-crime stories about murders that take place among close-knit groups of people, including coworkers, neighbors and community members.

In the wake of every murder, clues appear. Murder Decoded tells forensics-driven stories of committed investigators deciphering which clues mean nothing and which ones will put a killer behind bars and bring justice to victims' loved ones.

HOMICIDE CITY takes a deep dive into the stories of unforgettable murders from the streets of Philadelphia. Told through the eyes of veteran homicide detectives, local reporters and the victim's families who have lost so much, these are the cases they will never forget.

When a group of people get together and take it upon themselves to kill. It can happen for a litany of reasons. But nothing is quite the same as a group murder.

Explore high-profile murder cases from the perspective of the medical examiner, as they work alongside homicide detectives to bring justice to murder victims and their families.

Every episode documents a town and its people through a murder that tore through it. The townspeople not only become our storytellers, but they also hold the clues to the puzzle that has forever changed their lives and how they understand their home.

Hidden amongst the rolling mountains and deep forests of the pacific northwest sits a breeding ground for one of the deadliest terrains in the world. Known as a serial killer's playground, this land once dubbed "Wonderland" due to its grandeur and summer beauty, washes away into nine dreary months of rain that bring gray skies and a falling mist that drives the demons among us to kill. These are The Wonderland Murders.

A female police chief in the Upper Peninsula of Michigan goes against all odds to uncover what happened on the night Chris Regan went missing and will stop at nothing to catch his killer.

Follow determined investigators working the most shocking murder cases as they reconstruct the tragic final hours in the victim's life, in order to find their killer and crack the case.

Uncover the heart-wrenching true stories behind crimes that transcended headlines and became part of popular culture. Exclusive first hand interviews reveal shocking twists, new evidence, and unexpected resolutions.

In this nerve-wracking true crime series, a home becomes the setting for unimaginable horror. Scenes of unbearable tension grab the audience and take them along for a chilling ride into true, unbridled crime.