More details emerge about suspect in Fort Hood shootings

Casey said about 20 different units were affected by the shooting. Secretary of the Army John McHugh singled out the 36th Engineer Brigade as especially hard hit, with four killed and 11 wounded.

McHugh said officials have not determined whether a case would be pursued in federal or military court and that no charges have been filed yet.

The shooting spree began as some 300 soldiers had been lined up to get vaccinations and have their eyes tested at a Soldier Readiness Center, where troops who are about to be deployed or who are returning undergo medical screening. Nearby, others were lining up in commencement robes for a ceremony to celebrate soldiers and families who had recently earned degrees.

Soldiers reported that the gunman shouted "Allahu Akbar!" – Arabic for "God is great!" – before opening fire, said Lt. Gen. Robert Cone, the base commander. He said officials had not confirmed that Hasan made the comment.

Officials are not ruling out the possibility that some of the casualties may have been victims of "friendly fire," shot by responding military officials.

When the gunfire subsided, soldiers described a scene that looked like a war zone: too many wounded to count, shells and blood on the floor, and comrades ripping off their clothes to make tourniquets to keep the injured alive. One woman, suffering from a wound to the hip, carried another victim to get help.

"You had people without tops on. You had people ripping their pant legs off," said Sgt. Andrew Hagerman, a military police officer from Lewisville, Texas.

Hagerman arrived at the scene minutes after the shooting stopped. When he entered the building, he kept his head down to avoid stepping in the pools of blood or kicking any spent shell casings.

"You could go around it," he said. "There was definitely a path."

The gunman was struck four times by a civilian police officer who was wounded herself. Authorities said Kimberly Munley fired on the suspect just three minutes after the gunfire erupted.

The gunman then spun around and charged at Munley with a gun in each hand, said her boss, Chuck Medley, director of emergency services at Fort Hood. He said Munley shot Hasan in the upper torso, allowing officers to take him into custody.

Munley, who was shot in the thighs and wrist, was recovering Friday at a hospital.

Hagerman said he saw Hasan laying on the ground receiving medical assistance for a gunshot wound as responders tried to get his handcuffs off to better treat him.

Hasan reported for duty at Fort Hood in July, after working at Walter Reed Army Medical Center in Washington for six years. Though he apparently had problems at Walter Reed, Fort Hood officials said they weren't aware of any issues with his job performance.

One of Hasan's bosses praised his work ethic and said he provided excellent care for his patients.

"Up to this point I would consider him an asset," said Col. Kimberly Kesling, deputy commander of clinical services at Darnall Army Medical Center.

Neighbors described a man who appeared to be getting his affairs in order just hours before the shooting. Hasan was set to deploy to Afghanistan with an Army Reserve unit that provides what the military calls "behavioral health" counseling, Army spokeswoman Col. Cathy Abbott said.

Villa, who moved next door to Hasan about a month ago, said she had never spoken to him before he came over to her apartment.

Shesaid Hasan gave her frozen broccoli, spinach, T-shirts and shelves on Wednesday, then returned Thursday morning and gave her his air mattress, several briefcases and a desk lamp. He then offered her $60 to clean his apartment Friday morning, after he was supposed to leave.

Another neighbor received a phone message from Hasan at 5 a.m. Thursday.

Jacqueline Harris, 44, said Hasan called her boyfriend, Willie Bell. "He just wanted to thank Willie for being a good friend and thank him for being there for him," Harris said. "That was it. We thought it was just a nice message to leave."

The manager of the apartment complex said Hasan recently was involved in a spat with another soldier living there over Hasan's religious beliefs. A bumper sticker that read "Allah is Love" was ripped off Hasan's car, which was keyed, said the manager, John Thompson.

Thompson said the neighbor had been in Iraq and was upset to learn that Hasan was Muslim.

Another neighbor, 42-year-old Kim Rosenthal, said Hasan didn't seem too upset by his scratched vehicle.

"He said it was Ramadan and that he had to forgive people," Rosenthal said. "He forgave him and moved on."

Hasan's mindset about his mission overseas wasn't clear. Someone who used to work with Hasan said he had expressed some anger about the wars in Iraq and Afghanistan, but neighbors said he appeared fine with his pending deployment.

"I asked him how he felt about going over there, with their religion and everything, and he said, 'It's going to be interesting,'" said Edgar Booker, a retired soldier who works in a cafeteria on the post.

Cone said authorities have not yet been able to talk to Hasan, but interviews with witnesses went through the night.

The wounded were dispersed among hospitals in central Texas. W. Roy Smythe, chairman of surgery at Scott&White Memorial Hospital, said some of the wounded have "extremely serious injuries" and several patients were still at "significant risk" of losing their lives.

The dead included a pregnant woman who recently returned from a tour of duty in Iraq, a man who quit a furniture company job to join the military about a year ago and a woman who had vowed to take on Osama bin Laden after the Sept. 11 terrorist attacks.

Also killed was Pfc. Michael Pearson of Bolingbrook, according to his parents.

U.S. Muslims reacted with both anger and fear of backlash after revelations that Hasan is a practicing Muslim. The nation's major Muslim organizations and several mosques condemned the attacks as contrary to Islam.

"The community is in a state of agony," said Muqtedar Khan, director of the Islamic studies program at the University of Delaware and a well-known progressive Muslim intellectual.

Some U.S. mosques stepped up security on Friday, the main prayer day for Muslims.

Hasan, who was born in Northern Virginia, pursued a career in psychiatry at Walter Reed, working as an intern, a resident and a fellow in disaster and preventive psychiatry.

But his record there wasn't sterling. He received a poor performance evaluation, according to an official who spoke on condition of anonymity because he was not authorized to discuss the case publicly. And while he was an intern, Hasan had some "difficulties" that required counseling and extra supervision, said Dr. Thomas Grieger, who was the training director at the time.

In an interview with The Washington Post, Hasan's aunt, Noel Hasan of Falls Church, Va., said he had been harassed about being a Muslim in the years after the Sept. 11, 2001, terror attacks, and he wanted out of the Army.

"Some people can take it and some people cannot," she said. "He had listened to all of that and he wanted out of the military."

At least six months ago, Hasan came to the attention of law enforcement officials because of Internet postings about suicide bombings and other threats, including posts that equated suicide bombers to soldiers who throw themselves on a grenade to save the lives of their comrades.

Investigators had not determined for certain whether Hasan was the author of the posting, and a formal investigation had not been opened before the shooting, said law enforcement officials who spoke on condition of anonymity because they are not authorized to discuss the case.

Federal authorities seized Hasan's computer Friday during a search of his apartment and took away a trash bin, said a military official who spoke on condition of anonymity because of the ongoing investigation.