TV Guide Investigation Discovery Wednesday

Lisa and Kevin Knoefel's selfless act ends in a shocking murder at the hands of the troubled teen, who is a pawn in a twisted plot.

After 4 women vanish, fear grips Texan communities, and desperate families seek answers; Texas Ranger Jim Holland launches a high-stakes interrogation.

Eline starts dating Matthew and has a son with him, but he's a man who was violent and full of rage, and when she leaves him, Matthew's fury explodes.

After 13-year-old Carrie Ann Jopek vanished into thin air in 1982, her body is soon found underneath a neighbor's porch, which sets off a hunt for her killer.

When 5-year-old Samantha Runnion is kidnapped by a man and dragged into his car in the Summer of 2002, the race is on to find her and the man responsible.

When a 12-year-old boy is abducted on Christmas Eve, a detective learns this was not the first time he went missing and will stop at nothing to solve the case.

Fil Waters investigates when three members of a tight-knit family are brutally murdered in broad daylight while working at their family owned car dealership.

After a mother is strangled to death in her bedroom while her son sleeps, and Detective Fil learns that the victim's own mother was murdered 25-years earlier.

Lt. Joe Kenda investigates the murder of a man who is severely beaten to death outside of a convenience store on New Year's Eve weekend.

When a man is abducted and is later murdered in execution style, Lt. Joe Kenda suspects the crimes are related, until discoveries present a shocking twist.

Lt. Joe Kenda investigates when the severed head of a wife and mother is discovered; a seemingly unsuccessful robbery is investigated.

A driver in a stolen vehicle leads a rookie cop on a pursuit through the woods; a convicted murderer leads a convoy of officers in every direction.

A carjacking in Florida sparks a wild police chase over land, air and sea, with the suspect stealing multiple vehicles in a desperate bid to outrun the law.

Police officers chase down two suspects with an assault rifle; a pursuit results in multiple casualties before the gunmen lead police into a fatal gunfight.

Tiffanie Adams is pregnant and disappears from her home in Sullivan, Ind., and the police stumble upon dark secrets surrounding the men in her life.

The shooting of ladies' man Jim Cornwell outside his home takes July 4th festivities on a tragic turn, and multiple suspects emerge tied to Jim's romantic life.

Suspects arise after the stabbing of a beloved mother in her home in Tomahawk, Wis., but then another stabbing occurs the next day.

An inexperienced police department handles the tragic murder case of young mother Jessica Currin, leading to critical errors and false accusations.

After a young father goes missing from work, the small town of Challis, Idaho, is busy with tales of infidelity and finger-pointing.

An argument in a bar leads to a hostage situation; a shoplifter fires upon an officer before going on the run; a suspect disappears into the frozen wilderness.

Deputies fight for their lives in a burning home as a violent suspect seeks to end his life; officers face a race against time to rescue trapped civilians.

When 60-year-old Ilene Gowan vanishes, her family fears the worst; weeks later, her body turns up under a frozen bridge and detectives trace her last steps.

After the murder of Johnny Soekhies, authorities turn to CCTV to hunt his killer, revealing a vehicle driving Johnny to the place of his eventual murder.

Deputies fight for their lives in a burning home as a violent suspect seeks to end his life; officers face a race against time to rescue trapped civilians.

When 60-year-old Ilene Gowan vanishes, her family fears the worst; weeks later, her body turns up under a frozen bridge and detectives trace her last steps.

After the murder of Johnny Soekhies, authorities turn to CCTV to hunt his killer, revealing a vehicle driving Johnny to the place of his eventual murder.

An argument in a bar leads to a hostage situation; a shoplifter fires upon an officer before going on the run; a suspect disappears into the frozen wilderness.

When tragedy strikes an elderly couple in Ethel, Wash., police investigate a trail of secrets and deception in order to solve the case.

A bitter rivalry between two sisters gets out of hand when the family moves to Las Vegas, which leads their dispute to transition among the next generation.