DENVER, Colo. -- A new indictment accuses the father of Najibullah Zazi of conspiring to destroy liquid chemicals, masks and other materials to obstruct the investigation of an alleged terror plot to attack New York City with homemade bombs.

Mohammed Wali Zazi, a 53-year-old Aurora airport shuttle driver, was arrested by FBI agents Monday morning at his Aurora home, his attorney said after a Denver federal court hearing in the afternoon.

U.S. Magistrate Michael Watanabe ordered the elder Zazi to be taken by U.S. Marshals to Brooklyn, N.Y., where he faces the new charge of conspiring to obstruct justice. That charged surfaced in the indictment unsealed Monday in Brooklyn federal court.

The new charge is the first hint that federal investigators have learned what happened to beauty supply store chemicals that Najibullah Zazi, a former Denver International Airport shuttle driver, allegedly purchased last year at Denver area stores in the plot to concoct homemade explosives.

The indictment alleges that Mohammed Zazi conspired with others to "corruptly alter, destroy, mutilate and conceal objects" to thwart the terror investigation. Among the items allegedly destroyed were "glasses, masks, liquid chemicals and containers."

The judge advised Zazi of the serious, new charge against him, which carries a maximum sentence of 20 years in prison and a $200,000 fine. Click here to read the indictment.

The elder Zazi was initially arrested in September on charges of lying to the FBI about his alleged efforts to alert his son about the terror investigation. He had pleaded not guilty to lying to investigators and had been free on bail while being monitored electronically.

Now that Zazi is charged in New York, Senior U.S. District Circuit Judge David M. Ebel in Denver dismissed the lying to federal authorities charge at the request of prosecutors.

The elder Zazi, handcuffed and wearing a traditional long white shirt and pants with gray Nike running shoes, appeared relaxed in court Monday.

Watanabe asked the elder Zazi if he understood why he was arrested and if he voluntarily waived his right to an identity hearing confirming he was the same man named in the indictment.

"I understand everything," Zazi said through a Pashtun interpreter.

"Yeah, I've been charged in the indictment," he said. "It is me, Mohammed Wali Zazi. As far as I know I am the same Zazi."

Zazi's public defender, Edward Harris, said it normally takes a week or two for a defendant to be transported across the country. But, give the priority of the terror case, Zazi might be moved faster.

"He seems calm," Edwards said of Zazi. "He seems to understand what he is facing. He intends, with the assistance of counsel in New York, to fight this case."

Edwards obtained a court order baring law enforcement officials from questioning Zazi before he is represented by attorneys in New York.

Najibullah Zazi is charged with plotting to bomb New York City subways. The younger Zazi, a Queens native who had moved to Aurora, is accused of buying hair products and other chemicals in an attempt to build "weapons of mass destruction," according to a September indictment.

Najibullah Zazi has pleaded not guilty to charges of conspiring to use weapons of mass destruction. He is being held without bail in New York.