Col. Scott Malcom of the U.S. Southern Command declined to specify how many more service members might be implicated. He said that military investigators were still trying to gather the facts about a night of partying Wednesday among Secret Service agents and military personnel who were part of the president’s security advance team for the Summit of Americas. 

 

 In a phone interview, Malcom said a military officer assigned to the U.S. Embassy in Colombia had conducted a preliminary review of surveillance tapes at the Hotel Caribe in Cartagena, which led investigators to believe that more than five U.S. military personnel may have been involved in the misconduct. Later, Malcom sought to clarify his remarks, saying he assumed investigators had reviewed the tapes, among other evidence, but did not know for certain.

“We are embarrassed,” Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, told reporters Monday when asked about the military’s reaction. “We let the boss down because nobody is talking about what went down in Colombia other than this incident.”