The State Department may have covered up allegations of illegal and inappropriate behavior within their ranks. The Diplomatic Security Service, or the DSS, is the State Department's security force, charged with ... investigating any cases of misconduct. According to an internal State Department Inspector General's memo, several recent investigations were influenced, manipulated, or simply called off. The memo obtained by CBS News cited eight specific examples. Among them: allegations that a State Department security official in Beirut engaged in sexual assaults" on foreign nationals hired as embassy guards. The memo also reveals details about an "underground drug ring" was operating near the U.S. Embassy in Baghdad and supplied State Department security contractors with drugs. Aurelia Fedenisn, a former investigator with the State Department's internal watchdog agency, the Inspector General, told Miller, "We also uncovered several allegations of criminal wrongdoing in cases, some of which never became cases." In such cases, DSS agents told the Inspector General's investigators that senior State Department officials told them to back off. In one specific and striking cover-up, State Department agents told the Inspector General they were told to stop investigating the case of a U.S. Ambassador who held a sensitive diplomatic post and was suspected of patronizing prostitutes in a public park.