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.

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.

When 27-year-old Christie Wilson disappears after a night at a local casino, surveillance cameras show her gambling with a mystery man.

Young professional Sasha Samsudean disappears after a night out in downtown Orlando, Fla.; detectives turn to video surveillance footage to unravel the mystery and bring Sasha's killer to justice.

On Nov. 7, 2014, 69-year old Ina Clare Richardson is found brutally murdered in a public park in Clarkston, Wash.; with no witnesses, investigators turn to surveillance cameras to piece together the puzzle of her fateful final night.

Kimberly Robertson's battered body is found on a sidewalk after a date with her boyfriend; a network of surveillance cameras show Robertson's last few hours alive.

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.

Murdered in his office, Dr. David Cornbleet's daughter finds him bound and gagged in a pool of blood, and police must rely on closed-circuit television images of an unidentified man to lead them to Cornbleet's killer.

In Pensacola Fla., loving parents are brutally gunned down in their own home, and the police must rely on surveillance cameras to catch the suspected killers and bring them to justice.

University of Florida freshman Christian Aguilar vanishes from campus, plunging his family and friends into turmoil, then a a closed-circuit television recording takes the case in a shocking new direction.

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.

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.

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.

Diane Cunningham is bludgeoned to death in her bedroom, leaving behind receipts as the only clues; security footage reveals a prime suspect with a motive, but not everything is quite as it seems.

Grainy security footage reveals what happened to 19-year-old college student Katie Poirier who vanished while working the graveyard shift at a gas station.

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.

On April 23, 2016, car salesman Hufracio Arteaga is found stabbed to death in his Michigan City, Ind., office; with no witnesses, investigators use surveillance cameras from an adjacent building to find out who murdered Arteaga.

After Keith Reed is gunned down on his doorstep, surveillance footage helps police unravel the mystery of who killed him and why.

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.

A woman is shot dead during her morning jog through a normally peaceful neighborhood in Glendale, Ariz.; home surveillance footage enables detectives to identify the shooter's vehicle.

On April 10, 2016, 45-year-old Jordie Hudson vanishes after a night out with friends, then investigators find her eye glasses in a pool of blood; a surveillance video shows an attack, and police race to find Hudson before it's too late.

As opposed to its sister series "See No Evil," which details unlawful activity rooted out with the aid of surveillance cameras, "Hear No Evil" uses authentic audio recorded at crime scenes to build each episode's narrative. The recordings, captured by victims' families, investigators and the killers themselves, reconstruct the murderous acts with the aid of first-person testimony, stylized re-enactments and video archive. The result is a series that ultimately lets viewers' imaginations and instinctive fears of the unknown come to the fore.

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.