CBS Reporter: More Revelations to Come on Holder

CBS investigative reporter Sharyl Attkisson, the journalist who has been uncovering many secrets in the burgeoning Fast and Furious scandal, told Fox News’ Bill O’Reilly Thursday night that there may be many more shoes to drop in the unfolding drama.

“It’s an incredibly major story that we have a lot more to learn about,” Attkisson said.

“Also documents, we haven’t really had time to report on all of them," she added. "There are a lot of sensitive documents and allegations going around, many of them we haven’t reported yet because we need to get more confirmation of them. But what you see on the surface that we do report in our stories is really only a part of what may be going on and we may be reporting in the future when we can get confirmation."

The scandal, which threatens to engulf Attorney Gen. Eric Holder, potentially becoming a major election issue next year for President Barack Obama, who gave his unequivocal backing to his attorney general minutes before the interview.

Under Fast and Furious, at least 1,400 assault weapons were allowed to cross the border into Mexico in the hope that they could be traced and would lead agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) to the cartel bosses.

But most of the weapons soon disappeared and they have been linked to dozens of crimes south of the border, including the February murder of U.S. immigration officer Jaime Zapata who was working from the U.S. Embassy in Mexico City.

Some of the guns were also used in this country. Two were involved in the December murder of border agent Brian Terry in Arizona; 40 were found in a stash in El Paso, Texas in January; and now Republicans say at least 11 crimes have been committed on U.S. soil with Fast and Furious weapons.