Welcome to Investigreat, LLC - Investigreat, LLC has over 30 years of experience in solving problems for many different people over the years. We are about replacing uncertainty with certainty. About making unknowns, known. About having the know-how and resources to solve mysteries. Leading the team are Private Investigators Adam and Terri Dornfeld, a husband and wife team that have many years of investigative experience, especially in surveillance and person locates.