Dr. Bux has participated in many international humanrights investigations for the International Forensic Program at PHR. His workfor international courts includes the exhumation of mass graves in Yugoslaviafor the United Nations International War Crimes Tribunal, and providing writtenreports for the Special Prosecutor for the International War Crimes Court inSierra Leone. The Archdiocese of Guatemala appointed Dr. Bux as Forensic MedicalExpert for exhumation of Archbishop Juan Jose Gerardi in 1998.
In 2001 heexhumed and identified 14 guerillas of the Tupac Amaru who were responsible forthe takeover of the Japanese Embassy in Lima, Peru, in the late 90’s. As aconsultant for the Attorney General of the Republic of Mexico he exhumed thebody of Guillermo Velez Mendoza and gave a declaration under oath in 2002. Dr.Bux returned to Mexico in 2005 as a consultant for the Attorney General of theRepublic of Mexico to examine review case files, examine skeletal remains, and offersuggestions for future work in the case of disappeared women in the bordertowns of Ciudad Juarez and Chihuahua.