Lt. Joe Kenda spent 23 years in the Colorado Springs Police Department, where he amassed a lifetime of memories catching killers and helping solve close to 400 homicide investigations. The vivid memories are brought back to life in this hourlong series, as Kenda reopens his "Murder Books" for viewers -- folders in which every detail of his murder cases is held -- to revisit the most disturbing cases still haunting him today. As he details the process of how he solved the crimes, Kendra also embarks on a personal journey, coming to terms with long-suppressed nightmares. As he says, "I don't want to tell these stories. I need to."

Powerfully emotional stories tell of people who have been targets of compulsive stalkers. According to the Centers for Disease Control and Prevention, more than 6 million people in the U.S. are stalked each year, and in most instances, the stalker is someone the victim already knows. The series' hourlong episodes dramatize actual cases through visceral re-enactments and pointed testimony of victims, family members and law enforcement authorities, revealing what happens when stalkers can't have what -- or who -- they want, and stop at nothing to ensure that no one else can either. The chilling accounts probe the mechanics of an obsessive mind and the devastating impact of delusion.

"It's not like in the movies," police Sgt. David White says, describing his encounter with a gun-wielding suspect that was captured on his body camera. The video is among those featured on this series, which offers unprecedented access to police units that are using this innovative and vital technology in the line of duty. The series takes viewers on the "ultimate ride-along" as they view the life-or-death, split-second decisions that those in law enforcement are forced to make on a daily basis. Each story weaves interviews with responding officers throughout to provide critical context to their decisions and to add additional insight to the life-changing, sometimes tragically fatal, moments.

Veteran journalist Paula Zahn steps out of the studio and into the field to unravel criminal investigations, tracking the drama of each story by featuring the opinions of those closest to the case, including law enforcement officials, the families of the victims and the incarcerated, lawyers from both sides, and first-time TV interviews with convicted murderers.

Investigation Discovery and People magazine partner to re-examine some of the most high profile crime cases in recent history. The one-hour series brings viewers tales of betrayal, buried secrets and unsung heroes, ripped from the pages of one of the nation's top weekly magazines. These stories transcended news and became part of pop culture, revealing shocking twists, new evidence, and unexpected resolutions. Interlaced within every episode are exclusive interviews with People's journalists, archival footage, re-creations, and firsthand accounts by those closest to the investigations.

Chilling scenarios unfold in this true-crime series, which tells actual stories of people who shared their lives with loved ones who became killers. Each hourlong episode puts viewers in the shoes of the loved one, who first notices that something is amiss, interprets the puzzling signs and clues, and eventually comes face-to-face with the horrible truth: that the person has a very dark side. Exclusive interviews and firsthand accounts of the critical moments leading up to the vicious acts showcase devastating, often undiscussed consequences on the people who have nurtured, loved and raised a murderer.

The urgency and intimacy of local news reports capture the murder investigations that turned small towns and communities upside down.

The power of Investigation Discovery's dedicated fanbase unites with legendary victims' rights advocate John Walsh to continue his lifelong mission to track down fugitives on the run and find missing children. On each hourlong episode, John tells the time-sensitive stories of two fugitives and two missing children, taking viewers on a journey through the eyes of family members, friends and authorities who are desperate for resolution. He is joined by his son, Callahan, who leads the operation on the ground, working in tandem with the community and local authorities to solve the cases.

Haunting true tales of murder set in stark wintry conditions; from a body frozen in the snow to a woman who vanishes in an icy wilderness, each mystery unfolds in winter's eerie silence.

Living in a surveillance society means everyday actions are caught on camera, mostly of honest citizens going about their routines. Video, however, doesn't discriminate; criminals also end up on film. "See No Evil" presents dramatic stories of crimes being solved with the aid of surveillance cameras. Testimony from police, eyewitnesses and families are woven into re-enactments bolstered by actual security-camera footage, which helps unlock answers to cases that otherwise might have remained unsolved and left dangerous perpetrators at large.

Neighbors turn against each other with frightful consequences.

Using dramatic re-enactments bolstered by police reports and forensic evidence, Investigation Discovery delves into the minds of female killers in "Deadly Women." Each episode focuses on four different cases in which women, for a variety of reasons and with a variety of methods, chose to take the lives of others. Stories featured include more recent cases, like that of Andrea Yates, the Texas woman who in 2001 drowned her five children one by one in the bathtub and then called police, to older cases like that of the "baby farmer" Sarah Makin in 1890s Australia, who killed illegitimate infants left temporarily in her care.

The most terrifying criminals often hide in plain sight, looking as ordinary as a friendly next-door neighbor. Those regular Joes are the focus of "American Monster," precisely because lurking within them are psychopathic killers. Similar to Investigation Discovery's "See No Evil," the hourlong series uses personal movie footage of the monsters-in-disguise at home with family and friends, giving viewers a sense of how their lives are seemingly normal. Interweaved are the stories of their astonishing crimes and interviews with neighbors and loved ones.

With one quick click the internet allows people to share information like family photos and professional accomplishments, making it easy to ignore or forget that behind clever screen names and witty captions is a dark digital world with real dangers and risks. In hour-long episodes, "Web of Lies" unravels tragic stories of deception and manipulation triggered by online interactions, from predators lurking behind Facebook profiles to creeps scouring chat rooms for their victims. Re-enactments are buttressed by comments from law enforcement personnel, true-crime experts and psychologists, plus first-person accounts from friends and families of the victims.

During his storied career at the Houston Police Department, Detective Fil Waters made a name for himself in the interrogation room as an eminently skillful interviewer capable of getting stunning confessions from close-mouthed criminals. Using his ability to plumb the psyches of suspects and develop successful strategies for systemized interviews, the highly decorated law enforcement officer has helped solve more than 400 murder cases. Now, Detective Waters teaches interrogation techniques to police forces around the country. Known for his smooth-talking style, Waters uses strategic lines of questioning to lay out the facts of the case, leaving the perpetrator with no option but to tell the truth. In ID's "The Interrogator," Detective Waters recalls his most famous cases and showcases his interrogation techniques designed to convince suspects to lower their guards and spit out answers the police never saw coming.

In many ways, the 1980s are considered the deadliest decade in recent history. Who wants to travel back in time knowing the 10 years consisted of infamous cases like the serial-killing crime spree of "Night Stalker" Richard Ramirez, the Menendez brothers' murder of their parents, and Mark David Chapman's cold-blooded shooting of music legend John Lennon? Investigation Discovery explores the dark side of nostalgia to recount other notable murder investigations from the '80s, an era of ego where excess and greed dangerously collide.

If anyone goes down a dark path in East Texas, Sheriff J.B. Smith and detectives Pamela Dunklin and Joe Rasco are right on their tail. The three crime fighters perfectly complement one another: Dunklin leads with her intuition and is detail oriented; Rasco is the analytical thinker of the group; and Sheriff Smith is their fearless leader, empowering Dunklin and Rasco to tap into their skillsets. Each episode focuses on a memorable case, retracing the crime scene, the evidence, and the power of deduction it took to bring a killer to justice. It features in-depth interviews and detailed recreations, with interviews from victims' friends and families, news media, and other law enforcement weaved throughout the episode.

Examining occasions where real-life home movies and photos meet true crime scenes.

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.

Love is not patient, nor is it kind, and it definitely does not conquer all. As described in this six-part series, everything people thought they knew about love is wrong. Episodes detail casualties of love, including former partners, jealous friends, scorned sons and daughters, and devoted family members. The stories of love triangles, hidden affairs and family secrets, depicted via stylized re-enactments, show the transfixing power of emotion and how it can beckon the most reasonable people into criminal madness. Sometimes the most dangerous people are the ones you least expect.