The California Private Investigators You Can Trust. The best private investigators combine in-depth knowledge and experience with integrity and diligence. Those words describe our firm precisely. As one of the leading private investigators and detective agencies in the Los Angeles region, we take pride in our outstanding reputation and consistently give our clients a solid reason to recommend us to others. Our professional investigators and surveillance experts conduct a wide range of investigative and related services for a variety of clients, including private individuals, law firms, businesses, organizations, and insurance agencies in and around the Los Angeles and Orange County areas as well as throughout the entire state of California.