Sigma Investigations

At Sigma Investigations , we provide professional traffic accident investigations across Northern California—designed to meet the needs of private individuals, attorneys, and insurance companies alike. Whether you’re involved in a minor fender bender or a complex liability claim, our reports are built for accuracy, reliability, and peace of mind. Why a Private Traffic Accident Report Matters Some police departments today operate under minimum reporting policies , meaning they may decline to...

When trust is questioned, facts matter. From infidelity to insurance fraud and child custody concerns, Sigma Investigations offers discreet, professional surveillance tailored to your needs. Let us help you uncover the truth—and gain peace of mind.

At Sigma Investigations, we do more than knock on doors. Our team is made up of licensed private investigators and former law enforcement, trained to track down evasive subjects, document every attempt, and do it all legally and discreetly. Here’s what sets a professional apart: ✅ Skip tracing for hard-to-find individuals ✅ Talking with neighbors and gathering leads ✅ Surveillance at homes or places of work ✅ Court-ready, GPS-stamped proof of every attempt