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.

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After the murder of a celebrity hairstylist, investigators look to his wife and ask if her alleged affair with her racquetball coach could be a motive for murder.

48 Hours on ID

The Monica Sementilli Affair

Investigation Discovery

Years before the conviction of South Carolina legal scion Alex Murdaugh for the murders of his wife and son, there was another mystery in Murdaugh country: the hit-and-run death of Stephen Smith, a 19-year-old gay man.

Stephen Smith: A Death in Murdaugh Country

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

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Heidi Firkus calls 911 after her husband claims an intruder is breaking into their Minnesota home; Heidi ends up dead, and the case remains cold for 10 long years until a new investigator takes a fresh look.

S20 E8 | Death at the Front Door - Who Shot Heidi Firkus?