Frizell Group International, LLC Frizell Group International, LLC. ( FGI ), was established in 1995 as a full-service Private Investigations firm Specializing in Investigations, Business Intelligence and Corporate Compliance with World Headquarters in Houston, Texas. FGI has a strong affiliate presence throughout the United States and in all major international markets as a result of agreements with other licensed investigators and security specialists who have a proven track record of results under strict FGI performance guidelines. In addition to numerous sources and contacts in a myriad of industries all over the world, FGI also maintains an on-line presence with major proprietary information networks and databases.