A man sits in an interrogation room. His hands are cuffed. His face is blank. The detective tells him his wife has been arrested. The man asks why. The detective says she has been charged with poisoning their neighbor. The man's face crumbles. He thought the neighbor died of a heart attack. He did not know that his wife had been poisoning people for years. He did not know that he was next.

In this case, a wife had been slowly poisoning members of her community with arsenic. She targeted people who had wronged her. A neighbor who complained about her dog. A coworker who got a promotion she wanted. Her own husband, who had been feeling sick for months. The symptoms were vague. Fatigue. Nausea. Hair loss. The doctors could not figure out what was wrong. The husband thought he had a rare disease. He did not know that his wife was putting arsenic in his coffee every morning.

The investigation began when a relative of the deceased neighbor requested an exhumation. The toxicology report revealed lethal levels of arsenic. The police searched the wife's home and found a bag of rat poison in the garage. Her internet history showed searches for "how to poison someone without getting caught." She was arrested and convicted of two counts of murder and one count of attempted murder. The husband divorced her from prison.

Turn down the lights, put on your headphones, and press play because the husband realized his wife's horrifying secret. But by then, he had already been drinking her coffee for months.

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