On November 23, 2012, Pennsylvania DJ Ervin Holton is found shot dead on his friend's porch. With no witnesses, investigators spot cameras outside a nearby store pointing directly at the crime scene.

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

On April 14, 2009, 25-year old student Julissa Brisman is found shot to death and bound in an upmarket hotel room in Boston. With no witnesses to the crime, investigators turn to surveillance cameras in the surrounding area and quickly unravel a serial attacker.

On November 12, 2012, Atlanta entrepreneur Terry Porter is found shot dead, execution style in the front yard of his home. There is no forensic evidence and no witnesses to the murder. Detectives hope surveillance footage will catch his killer.

In February 2008, Christopher Duncan left his apartment in San Antonio, TX, never to return again. Police have little to go on until surveillance footage has the potential to reveal the identity of a dangerous killer.

On September 7, 2009, 27-year-old Jessika Kalaher is found strangled in her car in Cedar Park, TX. With her wallet and car keys missing, detectives turn to security cameras in the hope of answering the questions: who killed Jessika, and why?

On August 18, 2015, 36-year-old Carl Starke is shot dead in cold blood near his home in St. Augustine, FL. While there are no witnesses, neighbors did hear shots. Armed with a likely time of death, police turn to CCTV to help hunt his killer.

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

On June 30, 2008, the bodies of Tom and Jill Estes are found behind a dumpster in Festus, MO. Police are baffled until a receipt leads to CCTV of a blood-stained suspect. A trail of bodies reveals a killer who must be stopped before he strikes again.

On August 25, 2015, 51-year-old care worker Torrance Cheeves is found stabbed to death in his San Antonio, TX, home. With no suspects and a trail of puzzling evidence, investigators turn to surveillance cameras in the surrounding area for answers.

In February 2015, the body of 26-year-old Celina Petersen is found dumped in an alley in South Park neighborhood of Seattle. When police recover surveillance footage from across the neighborhood, they begin to unravel the shocking truth behind her murder.

On March 27, 2017, Andrew Nesbitt is found dead on his 46th birthday in his Madison, WI, apartment. With no witnesses, investigators turn to surveillance cameras in local bars, cabs, and street corners to track down his killer.

In April 2010, 12-year-old Alajawan Brown is gunned down outside a 7-Eleven in Skyway, WA - a block from an earlier shooting. As police question if the two are related, only CCTV can help piece together the puzzle and ID his killer.

On October 1, 2009, 37-year-old Natasha Cournoyer 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 Valentine's night, 2015, 27-year-old James Enright 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.