Congress issued a subpoena to Attorney General Eric Holder Wednesday for his alleged involvement in "Operation Fast and Furious."

The operation was set-up by the U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives to track guns supposedly going to notorious drug lords.

However, the guns never led authorities to cartel leaders and have been linked to other crimes, including the killing of U.S. Border Patrol Agent Brian Terry. Terry was gunned down in Arizona last December while trying to apprehend armed suspects at the border.

House Oversight Committee Chairman Darrell Issa (R-CA), who issued the subpoena, has accused Holder of withholding information about his part in the operation.

"Top Justice Apartment officials, including Attorney General Holder, know more about Operation Fast and Furious than they have publicly acknowledged," Issa said in a statement. "The documents this subpoena demands will provide answers to questions that Justice officials have tried to avoid since this investigation began months ago. It's time we know the whole truth."

Just last week President Obama showed support for his Attorney General.

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"I have complete confidence in Attorney General Holder, in how he handles his office," the president said in a news conference last Thursday. "He has been very aggressive in going after gunrunning and cash transactions that are going to these transnational drug cartels."

Sheriffs in Arizona called on the President today to start an independent investigation into the sting operation.

Arizona Sheriff Paul Babeu had harsh words for Holder earlier this week.

"Eric Holder, in my opinion, should resign," Babeu said at a news conference in Phoenix. "Nobody in America is above the law, including Eric Holder, including President Obama. There is no king."

Holder told reporters yesterday that he would comply with the subpoena despite having already sent "thousands of pages of documents" to Capitol Hill.