One source for both
   federal and state prison inmate searches.

EBI offers both federal and state searches of prison inmates. A prison inmate search will reveal if an applicant has ever been under the jurisdiction of the Department of Corrections; this report searches corrections (or prison) departments. Reports generally include a prisoner's name, birth date, any aliases associated with the defendant and any information pertaining to prison sentence histories. Some state searches also include the offense, the sentencing date and the county where the offense occurred.