Crime Scene

Series of modern d20 sourcebooks covering criminal investigations, police organizations, and crime-centered campaigns.

Produced by Hogshead Publishing & Greywood Publishing, the series consists of six books, original published in soft cover and then rereleased as pdfs:

HONG KONG
FEDS
FORENSICS
RED PINE HOLLOW
TRIADS
YAKUZA

These sourcebooks detail specific aspects of policing, criminal activities and geographical locations as well as providing new character classes, skills, feats and a scenario in each book.