Season 31

When a prominent Santa Rosa, CA, couple is found gunned down at the offices of one of the world's most popular cartoons, detectives are left to untangle the inner workings of a decades-long marriage.

A picture-perfect Navy family is shattered when the father is found shot to death after returning home from deployment; detectives are led to believe the crime is a tragic coincidence until a dark plan devised from lust and greed comes to light.

When a father in Spokane, WA, is found shot to death in his vehicle, detectives work for years to unmask a vicious killer who isn't afraid to silence witnesses; they eventually uncover a long-kept family secret that breaks the case wide open.

After an Air Force recruiter is found dead in a ditch near his Ohio home, authorities chase down several leads until the case culminates with a sting operation worthy of an international spy drama.

After gunshots ring out in rural New Jersey, police discover a beloved father shot to death and a vehicle taken from the premises. Investigators must determine if this is a random act of violence or a murder plot spun from an ongoing dispute.

After a local antique shop owner is murdered in a seemingly random home invasion, North Carolina police discover there is more to the story when a web of lies and infidelity are revealed.

When a retired nuclear physicist is reported missing, investigators discover he lived a reclusive life fueled by paranoia. As detectives race to find him, they begin to wonder whether his fears were unfounded, or if his worst nightmare had just come true.

When a local general store owner in Rusk, TX, calls 911 making a harrowing confession, the investigation is seemingly cut and dry. As detectives dig deeper, they discover a disturbing pattern making them rethink the motivation behind this crime.

An early morning apartment fire in Fort Worth, TX, sparks a murder investigation when 31-year-old Ashlea Harris' body is found beaten and bound inside; detectives quickly work to solve the case and uncover an elaborate plot fueled by revenge and greed.

After a mother and son are brutally attacked during a home invasion, Illinois police chase down several leads. They uncover a shocking motive with an occult leader and her loyal followers at the center of the crime.

When a beloved mother goes missing on her birthday, detectives are faced with several possible suspects before focusing on a co-worker with a shocking past who will do anything to hide their true identity.

After a small-town man is found shot to death at a Missouri roadside park, the evidence trail leads detectives further into the man's complicated past where they uncover a wicked plot that no one saw coming.

Police follow a lead in a missing persons investigation to a 115-acre farm, unearthing the site of a gruesome crime and a seductive killer that will go down in New Hampshire history.

A loving father agrees to give his ex-wife a chance to reconcile. When his loved ones can’t reach him, however, an unexpected tip is brought to Oklahoma police that will uncover a toxic love triangle and horrific crime scene.

When a beloved family man dies in a house fire, his wife and children must grapple with their unexpected loss. As investigators delve deeper into the fire’s origin, evidence exposes a scheme involving fraud, infidelity and a killer fueled by greed.

When a professional basketball star is gunned down in his hometown of Memphis, the case goes cold for nearly a decade. However, after a new team of investigators take over, they uncover the missing murder weapon and a mastermind close to home court.

A 62-year-old man bails his stepdaughter out of jail for attempted murder and soon after is found dead of natural causes. But investigators learn his death may not be what it seems, and a family must turn on each other for the truth to be revealed.

A San Angelo woman loses three romantic partners in the span of three years. Texas Rangers are brought in to investigate the most recent death and look to uncover if this is terrible misfortune or a diabolical pattern.

Years after a beloved father is accidentally shot in his home, the family matriarch mysteriously vanishes. As a second investigation launches, a shocking confession reveals a family secret about how far a son is willing to go for his mother.

(S31:E20) wasn't aired at this time as she is getting a new trial. // A frantic 911 call leads police to the bodies of Pam Hargan and her youngest adult daughter Helen Hargan in what appears to be a murder-suicide in the upscale neighborhood of McLean, VA. Investigators soon discover a trail of deceit that exposes an unexpected killer.

When a 32-year-old man vanishes in Fort Meyers, FL, police quickly link an abandoned, blood-soaked vehicle to his case. Investigators use GPS to retrace his steps and must determine if this missing man is a victim or killer?

An Arizona man is shot to death in his garage before he’s able to read the results of a paternity test. Investigators follow a surveillance trail across town to uncover the twisted events that led up to his death.

When a loving father is gunned down in upstate New York, a hunt for the gunman ensues that crosses state lines. As several suspects are brought in, investigators must determine who’s telling the truth to finally reveal the ruthless mastermind.

When a Texas woman discovers her husband’s brutally stabbed body in their ransacked home, police suspect he was the victim of a robbery gone wrong. As they dig deeper, a torrid love affair built on manipulation and greed is unveiled.

After what appears to be a fatal road rage incident, authorities in Clifton, AZ, follow a trail of recovered text messages that suggest this was no random attack, but instead a cold-blooded murder.

A prominent private investigator is reported missing after he fails to return from a business trip. When the case goes cold, a former Russian spy assists the FBI in a sting operation to uncover the truth behind his disappearance.