From the assassination of President William McKinley on September 6, 1901, to the mass killing at Columbine High School on April 20, 1999, the 20th century saw many murderous events that are difficult to contemplate but have become a part of the national history.

This reference book is divided into three parts. Part One, arranged chronologically, details 53 of the most famous murder cases of the 20th century in the United States. In Part Two, over 300 entries (alphabetically arranged by criminal) provide descriptions of crimes and are subdivided into male, female, and juvenile murderers; pair and group murderers; hate crime murderers; and school killings. Part Three features crime events related to over 40 selected victims. Cross references guide the reader to additional information. An index is included.