article_snippet.sent: U.S. officials said the .
article_snippet.sent: unnamed country was Colombia.
article_snippet.sent: 2005, but U.S. officials said the DEA did not investigate U.S. officials .
article_snippet.sent: from a once-confidential internal DEA report which quoted an . agency informant alleging that U.S. agents who took part in the .
article_snippet.sent: 2,' was quoted in an excerpt from a once-confidential internal DEA report which quoted an . agency informant alleging that .
article_snippet.sent: a once-confidential internal DEA report which quoted an .
article_snippet.sent: According to a once-confidential internal DEA report which quoted an . agency informant, Cooperator 1 also 'stated Cooperator 1 ' could .