Border patrol agents discovered the bodies of a young mother and her toddler son along the Rio Grande. Detectives closed in on a surprising suspect.

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Legal scholar Dan Markel is gunned down execution style as he pull into the driveway of his Florida home. Detectives hunt for a killer, asking themselves who would hire a hitman to murder a law professor.

A man is gunned down on a Louisville sidewalk during Derby week. A few weeks later, the bodies of two teenage boys are found burned and abandoned in a vacant lot. Detectives investigate a strange connection between the murders.

In Dallas, TX, middle-aged couple Jamie and Jennifer Faith were on a routine early morning stroll with their dog when a man attacked out of nowhere, injuring Jennifer, duct taping her hands, and fatally shooting her husband, Jamie. What was behind the mystery attack?

When devoted single mom Becky Bliefnick fails to pick up her boys from school in Quincy, IL, her father went to check on her and found her dead in the bathroom. Detectives learn she was going through a contentious divorce and dating someone new; they find a major clue in an unlikely place–on an episode of the game show "Family Feud."

When Ilene Gowan, a popular waitress at a local bar in Council Bluffs, Iowa, was found dead by the side of the road, her family called in famous forensic examiner Dr. Michael Baden to help solve the case.

Police receive a frantic 911 call about a woman who witnessed a murder; during her interrogation, detectives they wonder if she is a terrified witness or a killer.

When single mom Sadie Beacham didn't receive a good night call from her boyfriend, single father Rosalio Gutierrez Jr., she was alarmed and went to his house to find his screen door wide open and blood all over the floor. Wisconsin detectives could not locate his body but DNA evidence pointed to someone Sadie knew well.

Kay Baker, a 3rd grade school teacher and divorced mom of two in Lithia, FL, was found lying in her neighbor's yard bleeding to death with her throat slashed. Soon after police arrive and search her house, they find a trail of blood outside and use a K-9 and then helicopter infrared leading to a suspenseful search. They spot a wounded man in the woods, and arrest him as a possible suspect.

Disbarred attorney Richard Merritt prepared for a last home-cooked meal with his mother before he was set to report to jail for embezzlement. But he didn't show up on time and his ankle monitor had been cut. The next day, relatives found his mother stabbed to death in the basement of her home. Eight months later, Merritt was found in Nashville, TN, under an assumed name. When the murder trial started four years later, Merritt claimed an intruder had attacked them both and he had fled for his life.

When Joleen Cummings, a hairstylist at Tangles Hair Salon in Yulee, FL, failed to pick up her children for a planned celebration, and was reported missing by her ex-husband. Investigators discovered a bloody scene at the salon, but the hairstylist and her SUV were gone. [also shown as S3:E5]

An heir to the Halliburton oil dynasty fortune, Jill Halliburton Su was found dead in her bathtub by her son Justin at her upscale home in a Davie, FL, gated community in 2014. The security cameras weren't working, a glass door had been shattered, and at least one room of the house had been ransacked. Police quickly focused on Justin as the prime suspect, grilling him intensely for hours. A few days later, when crime scene DNA forensic tests were finally processed, Justin was cleared; and investigators were after a new suspect.

Makeva Jenkins, a successful businesswoman and pregnant mother of three, boasted on Facebook that she had grown her business to six figures from being homeless. But just hours later, she was shot dead with a bullet to the head. Her husband Euri Jenkins, her brother Quay, and Euri's friend Dametri all relayed to police that a masked intruder had shot and killed her. Police soon uncover a murder-for-hire plot.

When Ohio State senior Reagan Tokes fails to respond to messages from her parents, they fear the worst. Their nightmare becomes a reality when a 911 caller reports the discovery of a female body in the local park, shot execution style. Knowing a brutal killer is on the loose, detectives race to solve the crime and soon discover CCTV footage.

Around 5:40 am on July 31, 2022 In Strongsville, OH, a car with three teenage friends inside - Mackenzie Shirilla (driver), Dominic Russo (front passenger), and Davion Flanagan (backseat) - careens into a building's brick wall at 100 miles an hour, killing two of them instantly and injuring the third.

Shayna Hubers called 911 to report she had killed her boyfriend, Ryan Post on, in self-defense after he attacked her. However, investigators soon learned he was planning a date with another woman and suspected Shayna killed him in a jealous rage.

For decades, the mystery of Michelle Martinko's murder in the mall parking lot in December 1979 haunted her family and the town of Cedar Rapids, IA, as police searched for her killer without success; the case went cold. 39 years later, through creative detective work and modern investigative techniques, the case took a new twist, leading to an arrest and first-degree murder charges in a long awaited, dramatic trial.

A New Year's Eve shooting in the small town of Benton Harbor, MI, and police body cam captures the heartbroken cries of Army Sgt. Kemia Hassel as she cradles her dying husband, Army Sgt. Tyrone Hassel III, who was on leave during the Thanksgiving holiday; he died from multiple gunshots. Despite the happy outward appearance of the attractive young military couple, investigators soon uncover a murder plot.

When Brandi Peters and her three children were found murdered in Tallahassee in 2010, prosecutors pointed the finger at her ex-boyfriend, Henry Segura, who owed her more than $20,000 in child support. But as the trial got underway, an imprisoned drug dealer came forward, saying he had ordered the murders from prison.

Popular 21-year-old South Carolina University college senior Samantha Josephson prepared to head off to Drexel Law School with a full scholarship. After a night of celebrating with her friends at the Five Points bar area in Columbia, she got into an Uber and disappeared. Tragically, her body was found 24 hours later, with more than a hundred stab wounds. Police discover that the car she got into was not her Uber.

A camper gathering firewood in Arizona's scenic Sunset Crater National Park was shocked to discover the body of 27-year-old Sasha Krause in a traditional long dress, wearing black shoes. Her Mennonite family and friends in New Mexico were stunned--she had no known enemies and was a beloved, studious young woman, who loved books. How did she end up dead so far from home? [also shown as S3:E3]

The murder trial of prominent lawyer Tex McIver transfixed Atlanta. McIver claimed his gun accidentally went off, unintentionally shooting his wife in the back as they drove home. But, did McIver have a secret motive to want his wife dead?

After trying for 20 years to solve the mystery of a 6-year-old boy found dead in the woods, an artist's age progression portrait of the child posted on social media leads detectives to find new clues.

When single mom Nicole 'Nikki' Vanderheyden is found naked, beaten and strangled in a Green Bay, WI, farm field, police immediately arrest her live-in boyfriend, Doug Detrie, who waited 18 hours to report her missing and has a history of domestic violence. However, as the investigation unfolded, a man she met at a bar became a prime suspect.