Two CIA personnel died in Mexico after a counternarcotics operation. Two additional Americans were reportedly expelled. Now a former Mexican attorney general faces an extraordinary accusation: TREASON.

An October 22 investigation reveals conflicting accounts of what American intelligence personnel were doing in Chihuahua—and whether their participation was ever authorized.

With a federal court decision expected October 24, we examine the deaths, the disputed authorization, the criminal charges and the unanswered questions surrounding CIA cooperation with Mexican authorities.

The central question: WHO GAVE THE ORDER?