Coast Guard Investigative Service, Coast Guard Marine Safety Office Miami and Immigration and Naturalization Service agents teamed up to crack two cases of merchant marine document fraud out of Miami July 3. The agencies served and executed search warrants at two locations on the Miami River, helping agents to collect evidence in support of an eight month CGIS investigation; resulting in a series of arrests. The documents seized during this operation included medical certifications, Standards for Training Certification and Watchstanders, employment letters that stated individuals were employees of maritime companies to help obtain U.S.