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."

Firefighters made a desperate effort to save the Huggins family of seven, 2 adults and 5 children, from a blazing fire in Akron, OH, but rescuers were too late. Police declared the fire was no accident and began an arson investigation, which included another unexplained fire a year earlier on the same block that killed a beloved elderly couple, Gloria Hart and Lindell Lewis.

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]

Mengqi Ji, a Chinese exchange student, found a career and a love match with Joe Elledge in the idyllic Missouri university town of Columbia; they married and started a family. It was a shock to her loved ones when she disappeared in October 2019 apparently to be with another man, leaving both her child Anna and her cell phone behind. Her remains were eventually found by a hiker in February 2020. [also shown as S3:E2]

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]

Ten days after Memphis NBA player Lorenzen Wright went missing in 2010, the player's body was found in a swamp, shot 11 times. He called 911 but never spoke; gunshots are heard in the background. Police search for clues to identify the killer but the case stalled for 3 years until an inmate confessed but was found unproven; it stalled again for 4 more years until a deeper investigation uncovering a murder plot. [also shown as S3:E4]

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.

Todd Kendhammer called 911 in a panic, describing a freak accident that occurred while he was driving with his wife, Barbara, in the passenger seat. He said a metal pipe had fallen from a passing flatbed truck, piercing the windshield and fatally injuring his wife. But Wisconsin police were suspicious of Todd's responses in the interrogation room, when his story continued to change, and his alibi didn't check out. Forensic details from the autopsy report cast further doubt on his story.

In Florida 2015, 36-year-old mother of two Amanda Colley was starting her life over after a contentious divorce and an ongoing custody battle with her ex-husband, James. One summer night, she returned to a ransacked house; her boyfriend Lamar and two of her girlfriends, Lindy and Rachel, arrived to join her as police were called. Then, gunshots rang out, glass shattered, and after 911 was called from inside the house, more shots were fired; Amanda and Lindy, a mother of three, were both dead, and Rachel was injured. (Lamar had run before the shooting as he knew he was the target.) The gunman took off before police arrived.

Jazz trumpet player Scott Sessions, from Greeley, CO, fails to show up for a gig. A few days later, his body is found wrapped in plastic and duct tape, partially burned, and hidden in a forest in Pingree Park, CO. Detectives soon discover a relationship that Scott didn't tell his loved ones about.

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.

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.

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.

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.

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.

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.

James Ray III, a prominent attorney, former NYC police officer, and former U.S. Marine, lived in an upscale Upper Montclair, NJ home with his girlfriend Angela Bledsoe, a successful businesswoman, and their young daughter. After a weekend away, Angela didn't show up for an appointment; Ray dropped their daughter off with his brother who found a note in her suitcase and promptly called 911. The police are dispatched to their house and find Angela dead on the kitchen floor; Ray and his BMW are nowhere to be found.

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.