A mom suddenly vanishes and a dad is under suspicion, but there was no body, weapon or eyewitness, and surprises cropped up along the way.

Investigating whether a toddler left in the car for seven hours while his dad was at work was a heartbreaking accident or murder.

Melissa Lewis disappears, leaving signs of a struggle and a strange orange mist behind her; her boss goes missing and leaves behind an even bigger mess, and a missing fortune.

This part of the Lone Star State is largely sheltered from hurricanes, but, as it turned out, not from one unnatural disaster.

After a young mom is found dead on the side of a country road, 40 miles from her Knoxville home, investigators scramble to figure out how she ended up there.

At first, the fatal fire that swept through the home of a young couple looked like an accident then investigators took a closer look and what they discovered about the fire, and this couple, left them burning with suspicion.

After an attack on a respected U.S. Army major in the middle of the night, police launch an investigation that reveals wild secrets -- secrets that might hold the key to murder.

A hockey player finds his wife murdered in their home; his daughter says she saw a robber, but the killer's identity turns out to be far more complicated; police have their suspects but her family members have questions of their own.

After Christina, the twenty-three-year-old fashionista, goes out to a high-end shopping mall on a Friday night and vanishes, police question everyone; they know someone is lying, but not who.

A double murder reveals a double life; the victims are a well-respected couple whose son plays poker for a living; his alibi is his ace in the hole, but when detectives find key evidence, they think they are holding all the cards.

A couple who made a fortune in gold is headed for divorce when the wife is murdered; on tape, the husband is not at the crime scene, but police think the video holds the key to unlocking a mystery.

A woman's life ends in mystery on a dead end road; a mother of three, loved by her family and tight-knit community; for years the murder investigation went cold, but secrets have a way of eventually coming out.

Big sky country and a dangerous highway set the scene of a fatal car crash; determining if the tragedy was an accident or a crime and the secrets behind the truth hiding in text messages sent just before a car crossed the line.

A popular teacher is savagely murdered in her home; there is an arrest, a trial, and a conviction, but when a bombshell comes in after the verdict, the convicted murderer is given a chance at freedom.

If a killer is still free after 25 years, then maybe they got away with murder; the trail goes cold, never to warm up again, until one day it does.

A newlywed receives terrifying emails with threats of kidnapping and death; the emails appear to come from an ex-girlfriend, but hiding behind the threats is a cyber-secret.

A woman disappears while on her morning jog.

A wife and a mistress vying for the same man end up in a high-speed showdown on a highway; after the man of their dreams, on his motorcycle nearby, gets struck and killed, his wife becomes accused of his murder.

A mother, her son and a cousin are kidnapped by terrorists while on vacation; a father turned negotiator tries to end the international hostage drama, but the price of freedom is a huge ransom.

A beloved kindergarten teacher and mother of two finds a new lease on life after shedding hundreds of pounds; when she suddenly vanishes from her home, investigators uncover a connection between her dramatic weight loss and mysterious disappearance.

A California couple's romantic getaway on a boat turns tragic when the young wife and mother is lost at sea; the case goes cold for years until a model with a checkered past goes undercover to find the truth.

At first it looked like a home invasion gone wrong at the house Ralph Candelario shared with his second wife, but when police learn the antique dealer's first wife had disappeared, they take a closer look.