ATF was hunting informant for FBI in Fast and Furious

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By Alicia Barron By Alicia Barron

WASHINGTON, D.C -- There is an unbelievable twist as the investigation into "Operation Fast and Furious" continues.

Agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives in Phoenix said they were told to look the other way as guns purchased in the Valley were taken across the border to the Mexican cartels where they disappeared. Many ended up at crime scenes on both sides of the border.

In a new letter, congressional investigators said one of the main targets the ATF was trying to catch in the operation was actually a confidential informant, already working with the FBI. The agencies never shared information and if they had, investigators said "Fast and Furious" might have ended months earlier, meaning fewer "unaccounted for" guns.

The congressional investigators are asking for more documents from the FBI and the Drug Enforcement Administration on this informant and what the agencies knew and never shared.