Private investigations for individuals, law firms, and insurance professionals for cases in Northern California

California PI License #190145

10+ years of surveillance & SIU experience

Member, California Association of Licensed Investigators (CALI)

One investigator. One case. Complete focus.

Summit Detective Agency is a Northern California private investigation firm led by licensed California private investigator Nick Quinn. With more than a decade of surveillance and special investigations experience, Nick provides direct investigator attention from the initial assessment through the final report.

Whether you are an individual navigating a difficult situation, a law firm building a case, or an insurance professional evaluating a claim, you can expect careful documentation, responsive communication, and complete discretion.

Investigative Services

From surveillance to fraud investigations, Summit handles cases across a wide range of personal, legal, and insurance matters.

Why clients choose Summit

Full focus on your case

Your case is never juggled alongside others. I take on one case at a time, giving it the full focus it deserves.

Fast turnaround

No bureaucracy, no delays. As a small agency, I move quickly and keep you informed at every step.


Complete discretion

Every case is handled with strict confidentiality. What you share with me stays between us.


Ready to begin?

Every case starts with a confidential conversation. Reach out and I'll get back to you within 24 hours. No commitment required.