The cover package reviews the century 's top 10 crimes , including the St. Valentine 's Day Massacre of seven mobsters by Al Capone 's henchman ; the brutal 1955 murder of 14-year-old Emmett Till , which galvanized support for the civil rights movement ; and the Manson family rampage , which ended the social experimentation of the ' 60s on a sour note .
They are the consensus top 10 crimes .