Question

The official inquiry into the Kennedy assassination was known as the what report

Answer 1

The official inquiry into the Kennedy assassination was known as the 
"The Warren Commission" but it ultimately came up fairly inconclusive. 

Answer 2

The official inquiry into the Kennedy assassination was known as the Warren Commission Report.

The Warren Commission (whose official name was The President's Commission on the Assassination of President Kennedy) was created on November 29, 1963 by the President Lyndon Johnson to investigate the assassination of President John F. Kennedy.

The Commission took its name from its president, Earl Warren, Chief Justice of the Supreme Court of the United States.