Even the FBI calls Patty Hearst’s kidnapping “one of the strangest cases in FBI history.” On Valentine's Day in 1974, a group of armed men and women grabbed the 19-year-old Hearst, beat up her fiancé, and left with the Hearst family heiress in the trunk of their car. The abductors were the Symbionese Liberation Army, or SLA, a group of hardened criminals who wanted to launch a guerrilla war against the U.S. government. After Hearst’s abduction, the SLA demanded millions of dollars in food donations in exchange for her release—although they had bigger plans for her: to turn her into their poster child. They went to work brainwashing Hearst to make her a member of their army, and within a few months, she was photographed wielding an assault rifle at a bank robbery in San Francisco. Hearst was eventually captured on Sept. 18, 1975, after more than a year with the SLA. Despite her claims of brainwashing, she was convicted and sentenced to seven years in prison in connection to the robbery. She served two years before being pardoned by President Jimmy Carter.