Senior State Department and Diplomatic Security officials may have covered up or stopped investigations of inappropriate or even criminal misconduct by staff, according to an internal memo from the department's Office of the Inspector General. An active U.S. ambassador routinely ditched his protective security detail in order to solicit sexual favors from both prostitutes and minor children," the memo says. The ambassador's protective detail and others "were well aware of the behavior," the memo asserts. When a diplomatic security officer tried to investigate, undersecretary of state for management Patrick Kennedy allegedly ordered the investigator "not to open a formal investigation." A State Department security official in Beirut allegedly "engaged in sexual assaults" against foreign nationals working as embassy guards. The security official ... was also accused of committing "similar assaults during assignments in Baghdad, and possibly Khartoum and Monrovia." An inspector general's investigator who went to Beirut to try to conduct an investigation was not given enough time to complete the job. U.S. Rep. Ed Royce, R-California, chairman of the House Foreign Affairs Committee, said he has asked his staff to begin an investigation into the allegations, and sent a letter to Secretary of State John Kerry demanding an explanation. "The notion that any or all of these cases would not be investigated thoroughly by the Department is unacceptable," Royce wrote in his letter to Kerry.