In 1947, as the Philippines struggled to recover from the ravages of war, criminality in all its forms increased dramatically, straining the meager resources of the newly reorganized police service in effectively combating sophisticated organized crime groups and the solution of complex crimes. Due to the increase of lawlessness in the land, DI personnel agitated for the conversion of the Division of Investigation into a bureau, believing that an enlarged, highly professional and better equipped bureau similar to that of the American Federal Bureau of Investigation was needed to effectively fight organized crime groups and solve crimes of a complex nature.