Investigation Discovery HD

Katie always knew her grandpa, Buster, as a kind man; he has a dark past but is the center of their big, close family; then comes the murder; he is not the man Katie thought she knew; she finally learns the hard truth about her grandfather.

Cassie Golonin disappears just before New Year's Eve from Fort Smith, Ark.; when family and friends conduct a search, the discovery of a shallow grave soon leads to the truth.

Carol-Ann and James Sharp seem like a match made in heaven, but behind the veneer hides a monster in plain sight; loved ones close to the couple sit down for the first time on camera to make sense of a murder that none of them saw coming.

After a young woman vanishes on her way to work, police desperately follow a trail of videotaped clues they hope will solve a complex mystery; the evidence found inside her car could be the key to solving the brazen abduction.

A gunman shoots a hero fireman dead in his own driveway; police focuses their investigation on the unusual firearm used to commit the crime and an odd trail of clues left behind by the victim himself.

Hunters found Army veteran Maribel Ramos's body in a remote area, sparking a hunt for her killer; investigators uncovered a fatal dispute with her roommate over unpaid rent.

A mother notices that her son is dark and detached and occasionally reveals to her fantasies of violence towards his own family. She begins to wonder if her once-happy, sweet boy is evil, but could never imagine the true terror her son would become.

Jeannette does everything she can to care for her son, Timmy; everything is going well until his dark side emerges, and he becomes violent and dangerous; despite every effort to help her son, she watches helplessly as he spirals into darkness.

When Tim Jones Jr. murdered his five children, his father, Tim Sr., was left to face the horrific reality of the son he raised and an evil he never believed possible.

A single mother overcoming addiction struggles to raise her son and daughter. Despite what appears to be a loving family and a sibling bond she could only hope for, she never could have foreseen the true monster that lies within her 13-year-old son.

Ron Youngblood always dreamt of having a family; when he meets Veronica, he thinks his dreams are coming true; instead, it's a nightmare; she's cold, cruel and unfaithful; when Ron tries to leave, she destroys everything he cherishes.

At 16, Roxie rushes into marriage; her husband manipulates and threatens her nearly every day; she leaves after 30 years but pays a terrible price.

Little sister Heather terrorizes her siblings, David and Crystal from a young age; everyone hopes she'll change when she becomes a mom, but she only gets worse; after Heather meets Kareem, she becomes a monster.

Maya Burgess always knew her brother, Stevie, was trouble; after he holds a butcher's knife to her brother's throat and threatens to shoot her at her wedding, Maya knows he is dangerous.

Skeletal remains are found in a military tough box, six feet underground.

Police find a murder victim inside a Civil War crypt in a historic cemetery in Southwest Philadelphia; detectives from two counties navigate the evils of a notorious motorcycle club to try and solve the case.

Pennsylvania State Troopers are tasked with a haunting murder investigation that takes more than a decade to solve after finding charred and decomposed human remains in the Poconos.

An entrepreneur is fatally gunned down in his warehouse, leading detectives to examine his disgruntled employees and his mistress in search of the killer.

They were partners in a car body shop, but when one of them goes missing, the police must investigate if they were also partners in crime.

Stephanie Shea Graham, 20, is found murdered on a desolate road; detectives gather clues and question suspects, and when the truth is finally revealed, the identity of her killer will prove to be more shocking than ever imagined.

Happy couple Bill and Mary Yoder run a medical practice outside of Utica, N.Y., but their world collapses after Mary falls ill, and detectives prove that her illness is no accident.

They were partners in a car body shop, but when one of them goes missing, the police must investigate if they were also partners in crime.