The number of crimes connected to a disastrous federal experiment that allowed Mexican drug traffickers to obtain U.S.-sold weapons is significantly higher than previously disclosed, according to internal government documents obtained by Judicial Watch.

Known as Fast and Furious, the failed program was run by the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) and allowed guns from the U.S. to be smuggled into Mexico so they could eventually be traced to drug cartels. Instead, federal law enforcement officers lost track of hundreds of weapons which are believed to have been used in an unknown number of crimes.

In the past few months several media reports have linked the lost guns to violence on both sides of the border while high-ranking officials in the Obama Administration, including Attorney General Eric Holder, insist they knew nothing about the reckless operation.

Among the first reports to surface; that Fast and Furious weapons were used to murder a U.S. Border Patrol agent (Brian Terry) in Peck Canyon Arizona in mid December. The guns—assault weapons known as AK-47s—were traced through their serial numbers to a Glendale, Arizona dealer that led to a Phoenix man the feds repeatedly allowed to smuggle firearms into Mexico.

But details like these have surfaced slowly as the administration scrambles to decide what version of facts it chooses to give Americans. What’s certain is that federal agents lost track of high-powered rifles and other guns, which have been recovered in violent crimes, both in the U.S. and Mexico. A few days ago, the nation’s Assistant Attorney General (Ronald Weich) admitted that Fast and Furious weapons had been used in at least three violent crimes in the U.S. and eight others in Mexico.