PHOENIX -- The man accused of bombing a government building in Casa Grande entered a plea of not guilty in a Phoenix courtroom Tuesday morning.
Abdullatif Aldosary, an Iraqi who came to the U.S. legally but was denied a Green Card, was indicted last week on charges of maliciously damaging federal property by means of explosives and being a felon in possession of a firearm.
Aldosary, 47, has not said a word during his previous court appearances. He remained silent once again during Tuesday's arraignment. His single utterance was to answer in the affirmative when asked if he swore to tell the truth.
Investigators say Aldosary, who was refused permanent-resident status because he fought with anti-government forces trying to overthrow former Iraq dictator Saddam Hussein in 1991, had done some specific research on what he would need to make a bomb before allegedly detonating a homemade explosive device outside the Social Security office on Nov. 30.
Nobody was inside the Social Security building when the bomb went off and no injuries were reported. The damage to the building was relatively minor.
According to the criminal complaint filed against Aldosary, evidence discovered in his home includes documents describing the bomb-making process and handwritten notes that read "Materials Needed." Investigators also seized a handgun, a rifle, hundreds of rounds of ammunition and several gallons of chemicals that could be used to make a bomb.
In addition, investigators discovered more than $20,000 in Aldosary's bank account, but they do not know the source of that money. Aldosary does not have a job.
Neither prosecutors nor investigators have talked about what might have driven Aldosary to allegedly bomb the building. The FBI is trying to determine if he has ties to any terrorist organizations. They also trying to determine if the Casa Grande bombing might have been a test run for a larger operation.
According to court records, Aldosary served prison time in 2008 after pleading guilty to aggravated harassment charges. He was sentenced to two months in jail and three years of probation, but his probation was revoked a year later and he was ordered to serve a year in prison.
Aldosary has been held without bond, remaining in the custody of the U.S. Marshal's Office since his arrest shortly after the explosion.
His next court appearance was scheduled for Feb. 5.
The Associated Press contributed to this report.