A wounded and bleeding Charles Stuart calls 911 with a terrifying tale of carjacking that results in the death of his pregnant wife. Police mount a manhunt for the described killers, but something just doesn't add up. [also shown as S1:E23]

Brian Barrett was shot to death just before he was supposed to meet his online dream girl. To catch the killer, police must venture into the murky world of chat rooms, but how can they solve the case when the killer is a virtual shadow? [also shown as S1:E24]

Wealthy couple Dennis and Merna Koula are gunned down in their suburban home. When the investigation reveals no signs of a burglary, police start to look for someone who thinks the couple would be more profitable dead than alive. [also shown as S1:E25]

When police informant Susan Smith disappears without a word, detectives assume she's taken off again. However, her sister Shelby insists that Susan's mystery boyfriend is up to no good. [also shown as S1:E27]

Day laborer Abraham Shakespeare wins $30 million in a lottery drawing, then he goes missing. While his family hopes he's living on a beach somewhere, his body turns up buried in a backyard. [also shown as S1:E26]

When Derrick Dorsey finds his wife Kim dead in their bed, he tells the 911 operator he thinks she committed suicide. Police find it a strange conclusion to draw since there are bullet holes in the wall and zip ties around Kim's wrists. [also shown as S1:E28]

Robert Spangler has very bad luck with his wives who all seem to wind up dead; when police see a pattern emerging, they take a closer look at who could be making it so dangerous to be married to Robert. [also shown as S1:E29]

Police investigate the once peaceful farming town of Payette, where kind-hearted preschool teacher Libbi Baune was violently stabbed to death in her own bedroom. It's shocking to think she would know anyone who would want to kill her. [also shown as S1:E31]

When Mark Winger shoots and kills an intruder who was violently attacking his wife, he is hailed by the public as a tragic hero. The case is quickly closed as a justifiable homicide, but for police, there's one piece of evidence that isn't adding up. [also shown as S1:E30]

There must be a murderer on the guest list when Ben Novack Jr., the wealthy organizer of a New York business convention, is bludgeoned with a barbell in his hotel room. [also shown as S1:E32]

After millionaire Bob Bosley is gunned down in a remote cabin, his wife, Amy, claims a robber killed him and dashed off into the woods. A wide search turns up nothing, but an investigation into Bob's lifestyle turns up many interesting details. [also shown as S1:E33]

Norma Rodriguez is found dead, her head wrapped in duct tape, in a baffling and brutal crime. Clues point to everything from a serial killer to a random burglar, but who has a personal stake in her death to be so cruel? [also shown as S1:E34]

Melissa Oxley is woken in the middle of the night by a shotgun blast and the smell of gunpowder, and her husband Ben is dead beside her. The killer has vanished, but the bigger mystery is why was she left alive? [also shown as S1:E35]

Shortly after Devon Guzman moves in with her partner Keary, she is found dead in the backseat of her car. Something doesn't add up, especially when police find out her open relationship status has more than one jealous lover. [also shown as S1:E36]

Single mother Dana Laskowski is found strangled to death in her home one night when her triplets are visiting their father. The crime scene suggests she knew her attacker and it seems there are a few people who had an unhealthy obsession with her. [also shown as S1:E37]

When two friends are shot to death in their beds, the words "Satan loves you" is left as a message in the kitchen. As the case widens, it becomes clear that there are several people who may have wanted these women dead, and Satan isn't one of them. [also shown as S1:E38]

When Bob Dorotick is found dead by the side of a countryside road with tire tracks leading from the scene, it's obvious he was murdered. But what's mysterious is that he wasn't hit by a car, he was bludgeoned, drugged and strangled. [also shown as S1:E39]

Jack Jessee is fighting a losing battle with cancer, but his remaining time is cut short when he is stabbed to death in his own home. Police quickly determine this is not a random crime, but all the best suspects have iron-clad alibis. [also shown as S1:E40]

After a late night pizza run, 18-year-old Dana Woods and 20-year-old June Guerry go missing. As their frantic parents search for them, they see a strange man driving Dana's car, and the girls are never seen alive again. [also shown as S1:E41]

When Carolyn Krizan-Wilson claims a barefooted burglar assaulted her and shot her husband Roy McCaleb to death, police spend years trying to track down the mysterious killer. It's only with the onset of dementia that Carolyn finally reveals the missing clue. [also shown as S1:E42]

When the severed head of Hervey Medellin is discovered by a sniffing dog in the famous Hollywood Hills, the violence of the dismemberment brings tabloid claims of serial killers and drug cartels. Police set aside rumors and focus on the evidence to catch a killer. [also shown as S1:E43]

When a dismembered body is found on the outskirts of Phoenix, it turns out to be traveling jewelry salesman Jay Orbin. While he adored his exotic dancer wife Marjorie, turns out she has a few lovers on the side, providing police with multiple suspects. [also shown as S1:E44]

Newlywed Mathew Solomon can’t find his wife Lisa after an argument on Christmas Eve. After a tearful press conference and city-wide search she is found strangled to death and abandoned in a garbage bag, and the true story behind her murder is anything but festive. [also shown as S1:E45]

When exotic dancer Anson "Buzz" Clinton is found shot to death by the side of the highway, it looks like a drug deal gone bad. But the investigation leads police officers into a tangled murdered plot involving crooked lawyers and a family bent on revenge. [also shown as S1:E46]

During an argument, dancer Stephanie Bruner walks out on her husband during a Colorado blizzard and is never seen alive again. When search parties find her body in a river, the manhunt changes to a murder investigation. [also shown as S1:E47]

High school student Shauna Marie Card is found viciously stabbed to death in a violent, angry attack in her own home. The only clue is secret diary that leads investigators on a convoluted path to a killer hiding in plain sight. [also shown as S1:E48]

Soon-to-be mother Cindy Thompson is brutally murdered in a horrifying night-time attack. While Cindy and her boyfriend Mark are excited for the arrival of this new baby, police eventually discover that not everyone felt the same way. [also shown as S1:E49]

When Robert Limon is shot working in a remote train yard, video surveillance reveals both a limping man and a motorcycle heading to the crime scene. In an investigation full of secret passions and lies, police must figure out which one is the real killer. [also shown as S1:E50 / Limon and Hearn]

Happy couple Billy and Billie Jean are shot and stabbed in their home, with a baby still cradled in Billie Jean's arms. The investigation reveals a bizarrely bitter online feud could be the cause. [also shown as S1:E51]

Navy Officer Cory Voss returns home from six months at sea and is shot to death at a drive-thru ATM. While at first it looks like a typical robbery, police discover not everyone was willing to welcome Cory home. [also shown as S1:E52]