In 2010, Amber Jackson, 57, disappears from her Kauai, Hawaii, home, only to be found days later deep in the wilderness and bludgeoned to death.

In 2013, Amber Bass, 22, is gunned down in her driveway following a night out with friends.

Twenty-eight-year-old Sharon Robinson is found murdered near New Orleans; detectives suspect her abusive police officer boyfriend.

In 1996, beloved teacher Norma Luobikis is found stabbed to death in her home, and evidence suggests an intimate bond between the victim and her killer.

In 2015, Devan Schmidt's half-naked and bruised body is found in her home; the toxicology report indicates a possible overdose, but there are also signs of foul play.

Twenty-three-year-old Codi Joyce ends up dead after a brawl at a house party in 2015, yet nobody has been charged for his death, and witnesses won't talk.

Sixteen-year-old Judy Rawlings vanishes in 2001 after a midnight ride with a friend, then her body is found in the woods a few weeks later.

Fifty-one-year-old Robin Pope goes missing, then, three weeks later, her decomposed body washes ashore just a mile from her ex-husband's home.

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.

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.

The holiday season between Thanksgiving and New Year's is often thought of as a celebratory period to spend time with friends and family. That is not always the case, though, as the period is not immune from experiencing the same types of violent crimes that occur throughout the year. This series documents stories of tragedy that struck during the holidays, with firsthand accounts from people who had friends or family members killed during the joyous time. Sometimes the victim is killed by someone close to them, such as a case of sibling rivalry turned deadly, but sometimes the killing is done by a stranger who interrupts a holiday gathering with gunfire.

Think "Cold Case" meets "CSI" with a bit of "Rizzoli & Isles" mixed in, then make it real. That's the formula for this unscripted procedural drama that follows two veteran female investigators as they attempt to crack murder cases that have lingered for years without answers and closure. Kelly Siegler is an attorney and former Texas prosecutor who successfully tried 68 murder cases in her 21 years on the job, including 20 capital murder death penalty cases in which she secured the death penalty in 19 of those trials. She gets help from veteran detectives, who dig into small-town murder cases that have gone unsolved for years in the hope of getting justice for the victims and their loved ones.