Dateline has covered several cases of crime and betrayal. Yet some stories sent shockwaves like The Prussian Blue Mystery.

LOS ANGELES — Two American women hospitalized for suspected thallium poisoning were in fair condition Thursday and were undergoing tests to determine why they fell ill while vacationing in Russia. Dr.

ST. CLOUD, Minn. — A 35-year-old has been arrested for allegedly poisoning his roommate with a lethal amount of Thallium. According to the National Institute of Health, the element Thallium is ...

A man accused of fatally poisoning his St. Cloud roommate has been found mentally incompetent to face the charges.

ST. CLOUD, Minn. – A Stearns County grand jury has indicted 35-year-old Stuart Hanmer for allegedly poisoning his roommate, ...