Thomason Investigative Services is owned and managed by licensed private investigator Derek Thomason, M.A., a retired law enforcement officer with over 20 years of public service and experience.
Our service is always reliable, comprehensive, confidential, and timely.
Thomason Investigative Services has associates throughout the State of
California. Every associate has prior law enforcement experience, meets
the highest industry standards for licensed private investigators and shares Mr.
Thomason's commitment to integrity and diligence.
The Private Investigation industry lost a good man this year with the passing of career law enforcement officer and private investigator Robert Bolton. We offer our condolences to his family and friends.