An investigation for the agency that oversees the U.S. Secret Service suggests Director Mark Sullivan lied during his congressional testimony in the Colombia prostitution scandal that ensnared 13 of his agents, multiple law enforcement officials and congressional sources tell FoxNews.com. 
Investigators with the Department of Homeland Security's Office of Inspector General (DHS OIG) have completed their investigative report, which will be referred to the Department of Justice along with a memorandum of activity that lists potential criminal actions. The report indicates Sullivan may have obstructed Congress by lying about the criminal associations of prostitutes involved in the scandal. The report also alleges Sullivan may have manipulated a report requested by the Senate Homeland Security and Governmental Affairs Committee, the sources said.