J. D. Tippit answer questions surrounding the events. President Johnson also hoped to quell rumors that arose after Oswald was shot by Jack Ruby that the assassination and subsequent shootings were part of a conspiracy. The committee, known as the Warren Commission (named for the commission chairman, Chief Justice Earl Warren), spent ten months investigating the murders and interviewing witnesses. On September 24, 1964, the Warren Commission released an 888-page report that concluded there was no evidence of a conspiracy and Lee Harvey Oswald acted alone in killing President Kennedy and Officer Tippit. The report also concluded that Jack Ruby acted alone in
U.S. Commission on Evidence-Based Policymaking more than 200 federal agencies, testimony from more than 50 individuals, and additional written comments from 350 individuals. The commission also received feedback from President Barack Obama's administration. On September 7, 2017, the Commission issued its final report, "The Promise of Evidence-Based Policymaking" which outlined a vision for "a future in which rigorous evidence is created efficiently, as a routine part of government operations, and used to construct effective public policy." The final report includes findings and 22 recommendations for the President and Congress that were unanimously agreed to by the members of the Commission. The Commission outlined three overarching