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After the shooting of 20-year-old Gabriel Perez at a fast food restaurant in Fargo, investigators follow a CCTV trail to zero in on a middle-aged couple with no obvious link to the victim, and unlock a secret with deadly consequences.

After the murder of Johnny Soekhies in Alabama, authorities turn to CCTV to hunt his killer. Footage reveals a vehicle driving Johnny to the place of his eventual murder and captures a glimpse of a sinister figure lurking in the shadows.

After the shooting of a military veteran in his own home, detectives hunt a trail of CCTV across Kansas City to find his elusive killers. Grainy footage reveals a connection between the hooded assailant and the driver of a silver BMW.

When Merrilee Cox-Lafferty disappears in Utah, investigators turn to CCTV to track her down. Then her car turns up 300 miles away in Idaho, new persons of interest enter the frame, and Merrilee's disappearance is something more sinister.

When a gunman shoots Reggie Ward at a gas station in Cedar Rapids, Iowa, witnesses and the victim's girlfriend, are unable to identify the shooter. Investigators follow a trail of surveillance footage and GPS data to find an unexpected suspect.

When 60-year-old Ilene Gowan goes missing, Council Bluffs PD turn to CCTV to retrace her movements. They follow a trail of footage to unpick the lies of someone close to Ilene, and reveal the shocking truth of what happened to her.

In Baltimore, a killer strangles two women to death less than a week apart.

In the aftermath of the brutal slaying of a homeless man, James Tony Wise, Portland PD, turns to the footage from surveillance cameras to find his killer. Detectives use the images to retrace the rampage through the city of a violent offender.

When 71-year-old Cindy Mudd goes missing, the Kanawha County Sheriff's Office turns to CCTV to retrace her movements. They follow a trail of surveillance footage to zero in on their suspects and reveal the shocking truth of what happened to Cindy.

When 56-year-old Andy McGuffee turns up murdered in his burnt-out home, the Oklahoma State Bureau of Investigation looks to surveillance footage to zero in on their suspects. It reveals the shocking truth of what happened to Andy.