Investigation Discovery continues its heritage of providing in-depth, compelling documentaries & series that challenge viewers to think about key issues that shape our culture and define our world.

Investigation Discovery

Diana Duve was last seen alive leaving a bar in Vero Beach, Fla., with her on-again, off-again boyfriend, Mike Jones; her mother knew something was wrong when Diana didn't call her, something she did every day.

48 Hours on ID

Where is Diana Duve?

Investigation Discovery HD

Angelina Fernandes, 11 years old at the time, witnesses her mother in distress at a bloody crime scene; she claimed she acted in self-defense when she fatally stabbed her fiancé, Andy Wagner, but it would be up to a jury to decide what happened.

What Angelina Saw

Joseph Elledge reports his wife Mengqi Ji missing; they uncover her remains buried under a juniper tree; police try to use DNA found on that tree to catch her killer.

The Tree That Helped Solve a Murder

After married couple Krista and Bart Halderson suddenly disappears, clues on the social media app Snapchat point to a culprit that no one would ever suspect.

The Snapchat Clue

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A series of non-fiction investigations that explore such themes as jealousy, murder and deceit.

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A night of music and hot-tubbing leads to professor Marianne Shockley's death and former psychologist Clark Heindel killing himself; police charge Shockley's boyfriend, Marcus Lillard, with her death.

S19 E8 | The Strange Death of Professor Shockley