This authoritative book represents the data, findings, and implications of a long-term FBI-sponsored study of serial sex killers. Specially trained FBI agents examined thirty-six convicted, incarcerated sexual murderers to build a valuable new bank of information which reveals the world of the serial sexual killer in both quantitative and qualitative detail. Data was obtained from official psychiatric and criminal records, court transcripts, and prison reports, as well as from extensive interviews with the offenders themselves. 234 pages.