Sixty-year-old social worker Francis "Maurice" Byrd is found dead in his home after being shot by an unknown assailant; security footage from the church opposite Byrd's house shows that he received many visitors prior to the discovery of his body.

British woman Sian O'Callaghan disappears after leaving a nightclub; with the clock ticking, detectives find footage of O'Callaghan getting into a taxi and race to identify the vehicle and its driver.

On Oct.1, 2009, Natasha Cournoyer, 37, disappears without a trace in Laval, Canada; as her friends and family struggle for answers, detectives must follow a stone-cold trail to uncover her final footsteps caught on surveillance cameras.

On Dec. 26, 2011, Hope Melton vanishes after being run off a country road; CCTV footage from a nearby gas station reveals a suspicious orange car that appears to follow Melton out of the parking lot.

Fifty-one-year-old care worker Torrance Cheeves is found murdered in his San Antonio home; with no suspects and a trail of puzzling evidence, investigators turn to surveillance cameras in the surrounding area for answers.

On Valentine's Day 2015, James Enright, 27, is stabbed to death outside a busy train station in Burnaby, Canada; despite cell phone footage of the attack, police struggle to identify his killer, until CCTV leads them to an unlikely suspect.

On March 29, 2016, Louise Dickey is discovered murdered in a bath of her own blood; with no imaginable motive for the homicide and no witnesses, detectives seek out surveillance cameras to uncover the shocking truth.

Twenty-four-year-old father-to-be Nathan Trapuzzano is shot dead while taking his morning walk; security footage from the scene shows the final shocking moments of Trapuzzano's life, but it may not be enough to help police hunt down his killer.

On Nov. 21, 2014, Jessica Padgett disappears; the only lead is her abandoned white Subaru; surveillance cameras show her driving into a parking lot and walking down a back alley, never to return.

Twelve-year-old Alajawan Brown is gunned down outside a 7-Eleven in Skyway, Wash., which is only a block away from an earlier shooting; only CCTV can help piece together the puzzle pieces and find Alajawan's killer.

Twenty-three-year-old student Dalene Carlson vanishes while out with her friends on a Saturday night; last seen hanging out at a bar, security footage reveals a number of potential suspects in Carlson's disappearance.

The body of a woman who failed to return from work the night before is found in a churchyard at dawn, and police turn to the city's surveillance cameras to catch her killer.

In Madison, Wis., Andrew Nesbitt is found murdered on his 46th birthday; with no witnesses, investigators turn to surveillance cameras in bars and taxi cabs and on street corners to track down his killer.

Twenty-seven-year-old Jessika Kalaher is found strangled in her car in Cedar Park, Texas; with Jessika's wallet and car keys missing, detectives turn to security cameras in the hope of finding out who killed her.

On April 14, 2009, 25-year old student Julissa Brisman is found shot to death in a Boston hotel room; with no witnesses, investigators turn to surveillance cameras to find a serial attacker.

In San Antonio, Christopher Duncan leaves his apartment never to return again; police have little to go on until surveillance footage offers up the possible identity of a dangerous killer.

Thirty-six-year-old Carl Starke is shot dead in cold blood near his home in St. Augustine, Fla.; while there are no witnesses, neighbors hear shots; armed with a likely time of death, police turn to CCTV to help hunt down Starke's killer.

Seventeen-year-old Casey Crowder vanishes early one Sunday morning after her car runs out of gas outside of Dumas, Ark.; with no leads and no witnesses, investigators are desperate to find any CCTV cameras that can lead them to the missing teenager.

The body of 26-year-old Celina Peterson is found in an alley in the South Park neighborhood of Seattle; when police recover surveillance footage from across the neighborhood, they begin to unravel the shocking truth behind her murder.

Tom and Jill Estes' bodies are found behind a dumpster in Festus, Mo.; police are baffled until a receipt leads to CCTV footage of a blood-stained suspect; a trail of bodies reveals a killer who must be stopped before he strikes again.

In the early hours of Sept. 28, 2011, student Maple Batalia is found shot dead in the parking lot of Simon Fraser University; with over a hundred cameras at their disposal, detectives must dig through the footage and figure out who killed Batalia.

Investigation Discovery's "The Murder Tapes" chronicles homicide investigations using raw and unfiltered footage, including body-cam, surveillance and interrogation-room footage. Family members react in real time, investigators give their first impressions at crime scenes and suspects protest their innocence before coming clean. Viewers see and hear it all, getting up-close and personal with real-life murder investigations. Episodes track cases from start to finish, proving that the truth wins out when tapes roll.

This series delves into the psychological showdown that takes place inside actual police interrogation rooms and dissects what happens to yield a confession. Each hourlong episode takes viewers through the twists and turns of a real homicide case, from the crime scene to the suspects' questioning to the ultimate confession. The police officers and detectives assigned to each case reveal their methodology while interviews with the suspects' and victims' friends and family shed light on the crime. In every case, the interrogating officer will "break" the suspect and get a shocking reveal of what really happened.

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.

Like a pane of glass cracking in all directions before shattering, the impact of a single crime can create ripple effects that forever alter multiple lives. This Investigation Discovery series unravels actual homicide cases to explore how the past continues to haunt the present for those involved -- loved ones, witnesses, and law enforcement. Each episode is structured around three distinct perspectives of the same crime, and as viewers learn different details by way of first-person interviews and stylized re-enactments, stories, which at first seem random, slowly start to intertwine.