Which strategy did Ida B. Wells use to initiate an anti-lynching law?

Ida B Wells used a strategy we would today called "data journalism" in her anti-lynching campaign. She traveled through the south keeping records of all the lynchings that occured and the reasons for them. She then put this together in her book "A Red Record: Tabulated Statistics and Alleged Causes of Lynchings In the United States" establishing several arguments of how lynchings were used to control African Americans.