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