Maj. Nidal Malik Hasan called himself a "soldier of Allah" on business cards found in his apartment after the shooting rampage at Fort Hood in which he is accused of murdering 13 people.
Hasan, an Army psychiatrist, reportedly obtained the business cards over the Internet. In addition to listing his profession and contact information, the cards contain a discrete reference to his religion: "SoA(SWT)."
Watchdogs say the first letters are shorthand among militant Muslims to "soldier of Allah." The last letters refer to "Subhanahu Wa Ta'all," which means "glory to God."
The business cards were among numerous discoveries in Hasan's apartment of interest to investigators, who also are looking into whether Hasan wired money to Pakistan before last week's massacre.
Reporters including Fox News camera crews were shown inside Hasan's sparse one-bedroom apartment. Hasan, 39, who was wounded in the Nov. 5 massacre and has been talking to investigators since he regained consciousness in the hospital, was charged Thursday with 13 counts of premeditated murder.
Among the items reportedly found in his upstairs apartment: bottles of vitamins and medications stuffed in a shoebox for which Hasan had obtained prescriptions or, in some cases, that he had prescribed for himself.
Combivir, a drug used to treat HIV, was in the stash with about a dozen pills left in the bottle, the Dallas Morning News reported. It had been given to Hasan in 2001 at Lackland Air Force Base in San Antonio, the newspaper said.
It wasn't known why Hasan had the HIV medication or whether he was taking it. Combivir also has been prescribed to medical workers to prevent exposure to HIV in needles.
Prescription cough suppressants were among the other bottles reporters said they saw.
A closed closet with a "Do Not Open" sign taped to it was photographed in Hasan's unit at the Casa Del Norte apartments. A manager there taped the closet door shut after inspecting it and letting the media in, according to the Morning News.
Israeli and Jordanian coins, a prayer rug, a psychiatric medicine manual, a green lockbox left in the kitchen sink, an empty paper shredder and a DVD burner also were seen in the apartment.
Officials investigating the murders confiscated other possessions.
Meanwhile, authorities say they're looking at whether Hasan was sending money to Pakistan --and if so, why. The Virginia-born soldier is the son of Palestinian immigrants, was raised in the United States and has some relatives still living in the West Bank.
Rep. Pete Hoekstra, R-Mich., told the Morning News that sources "outside of the [intelligence] community" have information about Hasan's possible ties to Pakistan, which is battling a large Islamist insurgency movement.
Hoekstra, the House Intelligence Committee's ranking Republican, declined to identify the sources.
"They are trying to follow up on it because they recognize that if there are communications — phone or money transfers with somebody in Pakistan — it just raises a whole other level of questions," he told the paper.
Hasan's family has said he doesn't have ties to Islamic extremists.
In another development, the military psychiatrists who supervised Hasan at Walter Reed Army Medical Center reportedly tried to re-channel his growing focus on American-fought wars in Muslim countries.
A Walter Reed staff member familiar with his medical training told The Washington Post that Hasan was ordered to attend university lectures on terrorism, Islam and the Middle East in the hopes of redirecting his increasing preoccupation with the conflicts felt by Muslim American soldiers on the front lines.
U.S. military doctors overseeing Hasan's medical training reportedly had been worried he was "psychotic" and possibly capable of killing other American soldiers.
Medical officials at Walter Reed Army Medical Center held a series of meetings beginning in the Spring of 2008 to discuss serious concerns about Hasan's work and behavior, National Public Radio reported.
"Put it this way," one official told NPR. "Everybody felt that if you were deployed to Iraq or Afghanistan, you would not want Nidal Hasan in your foxhole."
An official who participated in the discussions reportedly told others he was worried that if Hasan was deployed to Iraq or Afghanistan, he might leak covert military information to Islamic extremists, NPR reported.
Another official "wondered aloud" to colleagues whether Hasan might be capable of killing fellow soldiers in the same way a Muslim sergeant in 2003 had set off grenades at a base in Kuwait, killing two and wounding 14, the radio network reported.
The officials who discussed Hasan's status were unaware — as some top Walter Reed hospital officials were — that intelligence agencies had been tracking Hasan's e-mails to a radical imam since December 2008, NPR said.
Officials considered kicking Hasan out of the program but chose not to partly because firing a doctor is a "cumbersome and lengthy" process that involves hearings and potential legal conflict, sources told NPR.
Officials also believed they lacked solid evidence that Hasan was unstable and were concerned they could be accused of discriminating against him because of his Islamic identity or views.
Hasan is accused of spraying a Fort Hood soldier processing center with more than 100 bullets last Thursday before civilian police shot him. He is recovering, under guard, at Brooke Army Medical Center in San Antonio.
The Associated Press contributed to this report.