Marie Hilley: The Woman Who Became Her Own Twin

She poisoned her husband.

She nearly killed her own daughter.

She vanished while out on bail.

Then she reinvented herself with a brand-new identity… and somehow convinced people she was her own twin sister.

This week on Once Upon a Crime, we unravel the unbelievable case of Marie Hilley. One of the most notorious Black Widows in American true crime history.

What began as the life of a seemingly ordinary wife and mother spiraled into a shocking saga of poisoning, manipulation, fraud, and deception that stretched across multiple states and identities. As investigators closed in, Marie stayed one step ahead by crafting elaborate lies, faking illnesses, and ultimately attempting one of the strangest identity swaps ever seen in a criminal case.

From arsenic poisoning to forged documents and a fugitive run worthy of a movie script, this case is as bizarre as it is disturbing.

If you think you’ve heard every wild true crime story, think again.

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