Dorothy Dandridge was born on November 9, 1922 in Cleveland, Ohio, to aspiring entertainer Ruby Dandridge (nee Butler) (March 3, 1900 - October 17, 1987) and Cyril Dandridge (October 25, 1895 - July 9, 1989), a cabinetmaker and Baptist minister, who had separated just before her birth. Ruby created a song-and-dance act for her two young daughters, Vivian and Dorothy, under the name The Wonder Children, that was managed by Geneva Williams. The sisters toured the Southern United States almost nonstop for five years (rarely attending school), while Ruby worked and performed in Cleveland.

In 1957, Dandridge sued Confidential (magazine) for libel over its article that described a scandalous incident, fictitious as it turned out, that it claimed occurred in 1950. In May 1957, she accepted an out-of-court settlement of $10,000.  Dandridge was one of the few Hollywood stars who testified at the 1957 criminal libel trial of Hollywood Research, Inc., the company that published Confidential as well as all of the other tabloid magazines from that era. Four months after her out-of-court settlement for $10,000, she and actress Maureen O'Hara, the only other star who testified at the criminal trial, were photographed shaking hands outside the downtown-Los Angeles courtroom where the highly publicized trial was held. Testimony from O'Hara, as well as from a disgruntled former magazine editor named Howard Rushmore, revealed that the magazines published false information provided by hotel maids, clerks, and movie-theater ushers who were paid for their tips. The stories with questionable veracity most often centered around alleged incidents of casual sex. When the jury and press visited Grauman's Chinese Theatre to determine whether O'Hara could have performed various sexual acts while seated in the balcony, as reported by a magazine published by Hollywood Research, Inc., this was discovered to have been impossible.  Dandridge had not testified during her civil lawsuit earlier in 1957, but in September she gave testimony in the criminal trial that further strengthened the prosecution's case. Alleged by Confidential to have fornicated with a white bandleader in the woods of Lake Tahoe in 1950, she testified that racial segregation had confined her to her hotel during her nightclub engagement in the Nevada resort city. When she was not in the hotel lounge rehearsing or performing her singing, according to her testimony, she was required to stay inside her room where she slept alone. Dandridge's testimony along with O'Hara's testimony proved beyond any doubt that Hollywood Research had committed libel at least twice. The judge ordered Hollywood Research to stop publishing questionable stories based on tips for which they paid, and this curtailed invasive tabloid journalism until 1971 when Generoso Pope, Jr. moved the National Enquirer, which he owned, from New York to Lantana, Florida.

When did the research trial start?
1957 criminal libel trial of Hollywood Research, Inc.,