After Cristina goes missing, detectives look for CCTV that may reveal her movements. When her cell pings at a location in Arkansas, detectives gather surveillance from the area in the hopes that it will hold answers to Cristina's disappearance.

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

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 police find 27-year-old Corey Lee Hughes dying on the floor from a gunshot wound to his head on June 21, 2019, they turn to canvassing for security video to find his attacker. A neighbor's camera captured a suspicious SUV leaving the scene and Evansville, IN investigators follow the clues to track down its driver.

Doug Coker, husband and respected businessman, vanishes after a meeting in Henry County, GA, in 2012. Meanwhile in Oxnard, CA, 23-year-old single mom Lorena Gonzales doesn’t come back from applying for a job.

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.

On a summer afternoon, police arrive at the scene of a traffic accident in West Chester, PA. Bianca Roberson, 18, sits dead at the wheel of her car. An autopsy reveals a sinister crime, but hopefully, CCTV footage will find Bianca's killer.

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.

Detectives turn to CCTV footage following the shooting of 65-year-old veteran and grandfather Billy Connole while he was taking a nighttime walk in Loveland, CO in 2015. The surveillance images reveal that the driver of an old pickup truck could hold the key to identifying the man's killer.

A newly engaged couple is found brutally murdered in their car parked in a deserted parking lot in Irvine, CA. To investigators it looks like an execution. There are no leads until a surveillance camera 90 miles away gives the investigation its first break - a killer bent on revenge.

In Pembroke Pines, FL, single mom Natalie Belmonte vanishes after a family party. Detectives have no leads until a neighbor's CCTV reveals a shocking tale of murder and betrayal. Across the state In Pensacola, police investigate the strange disappearance of popular news reporter Sean Dugas, and find themselves drawn into an addictive world of gaming.

On March 29, 2016, 63-year-old Louise Dickey is discovered by her daughter in a bath of her own blood; she had been stabbed 98 times and her car was missing. Independence, MO detectives look for surveillance footage to catch the brutal killer after her car was found in a store parking lot.

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.

The brutal murder of an elderly landlady offers no forensic answers. Detectives piece together her final days using security footage and hope to discover a vicious killer's motive before they strike again.

In 2017, 33-year-old Michael Scott is shot dead on the streets of downtown Baltimore. Detectives are in a race against time to find the gunman before he strikes again. Can a trail of cameras lining the city’s streets and buses lead police to the killer? [also shown as S9:E2]

In Cleveland, TX, a masked man guns down 40-year-old store clerk Conbino 'Bino' Crasto during a gas station robbery in 2016. Surveillance video sends police on a hunt for three masked suspects, and a nearby camera captures the getaway vehicle leading to the mastermind behind this brutal crime.

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.

Devoted family man Dr. David Cornbleet is brutally killed in his office. His daughter finds him, bound and gagged, in a pool of blood. Police must rely on CCTV images of man with a concealed face to lead them to David's killer in this twisted tale.

When Marcel Reardon is discovered bludgeoned to death outside a building, his friends deny all knowledge of his murder. But detectives are convinced at least one of them is lying. As the net closes, the prime suspect prepares to strike again.

In 2016, in Kamloops, Canada, a motel cleaner finds the body of an unidentified woman in one of the rooms; detectives turn to surveillance cameras to track a mysterious suspect in a cowboy hat, leading to a desperate manhunt across Canada.

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.

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.

In Pensacola, FL, Byrd and Melanie Billings, loving parents of 9 adopted children with special needs (in addition to their older biological adult children), are brutally gunned down in their own home. Police must rely on surveillance cameras to catch the suspected killers and bring them to justice.

When loving couple Gary and Linda Haas fail to reach their vacation campsite, New Mexico State Police are called in to investigate. With no forensic evidence and no witnesses, all they can do is scour CCTV footage for clues to unravel the mystery.

Michelle Mockbee goes to work early to get a jumpstart on payroll. Less than an hour later, she's murdered outside her office. Following the surveillance footage leads detectives to a closet full of dirty secrets that may have been worth killing over.