Investigation Discovery HD

Detective Ryan Jorstad follows a digital trail of evidence after police find a man shot and robbed in his own truck; as he uncovers a series of messages, he reveals a perpetrator who will stop at nothing to protect his identity.

Detectives investigate the murder of 20-year-old Joseph Douglas, shot execution style in Texas; when leads stall and rumors swirl, his mother turns to Texas Ranger Jim Holland, who reopens the cold case to pry loose the truth from guarded suspects.

When police find 27-year-old Corey Lee Hughes dying on his kitchen floor, they turn to security video to find his attacker; a neighbor's camera captures a suspicious SUV leaving the scene; investigators follow the clues to track down its driver.

When Asia Adams' body is discovered after a fire in her home, police are unsure if her death was an accident or arson; when the investigation reveals the truly horrific nature of her murder, police find themselves pursuing an elusive killer.

When beloved disc jockey Alberto Martino is found bludgeoned to death outside his radio station, it appears to be a robbery gone wrong; police quickly learn that Martino was not a random victim but the focus of a carefully orchestrated homicide.

A young mother's unexplained illness shocks doctors when tests reveal extreme poisoning, prompting investigators to examine those closest to her life as suspicion grows around her inner circle.

A woman's reported accidental shooting leaves her family uneasy for years until new surveillance evidence surfaces prompting investigators to revisit what may have happened inside that bedroom. Anne-Marie Green reports.

A decades-old murder investigation gains momentum with new forensic testing, but a daughter remains convinced authorities have the wrong suspect, deepening the emotional stakes; Natalie Morales reports.

A phone containing murder evidence prompts police to investigate a killer.

Police must track down a killer a year after they let him get away; in a race against time to arrest him before he acts again, they find him but, in a shocking twist, discover that the murder video on the phone is just the tip of the iceberg.

The trial reveals more horror, and a woman interviews the killer in jail.

A look inside the mind of psychopaths to discover when common pervasive traits deviate into violence, such as grandiosity, sadism, superficial charm, manipulation, lack of empathy and having a parasitic lifestyle.

Experts examine unique characteristics of female psychopathic killers, whether they are as rare as people imagine, and their crimes.

A farmhand in Rapelje, Mont., finds her co-worker murdered; as authorities look for the murderer, all the employees on the pig farm become suspects.

When a local resident of Dunlap, Tenn., is picking up cans, he makes the shocking discovery of a murder; authorities piece together the crime.

A lively slumber party turns into a nightmare when a loving mother, her young daughter, and her daughter's friend are murdered.

When Casey Morgan is found dead inside her home, police must unravel her dating history to figure out the killer.

Beloved wife and cardiac nurse Lorie Kirkley goes missing from the safety of her home in what appears to be a burglary gone wrong; several strange clues are found.

The town of Higginson only has two full-time police officers, and one is gunned down while on duty.

On Friday the 13th, 14-year-old Amber Dubois vanishes; a year later, Chelsea King disappears nearby; as fear spreads, a survivor links the two-and exposes a predator hiding in plain sight.

On a dark and stormy night, police find a family dead in their mansion; a bloody mask lies nearby; a letter to the victim's mother hints at something darker than murder-suicide.

Two teens disappear in the remote terrain of western Utah during a brutal winter. Families fear an accident, but detectives chase false leads and elusive suspects as they unravel a far darker mystery and search for the truth.

A young woman vanishes after entering a patrol car; for 35 years, she's a Jane Doe; as fear and rumors consume a small town, a chilling clue under hypnosis cracks the case open-and exposes a predator no one saw coming.

On a dark and stormy night, police find a family dead in their mansion; a bloody mask lies nearby; a letter to the victim's mother hints at something darker than murder-suicide.