OAK CREEK, Wis. -- Before he strode into a Sikh temple with a 9mm handgun and multiple magazines of ammunition, Wade Michael Page played in white supremacist heavy metal bands with names such as Definite Hate and End Apathy.
The bald, heavily tattooed bassist was a 40-year-old Army veteran who trained in psychological warfare before he was demoted and discharged more than a decade ago.
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A day after he killed six worshippers at the suburban Milwaukee temple, fragments of his life emerged in public records and interviews. But his motive was still largely a mystery. So far, no hate-filled manifesto has emerged, nor any angry blog or ranting Facebook entries to explain the attack.
Oak Creek Police Chief John Edwards suggested Monday that investigators might never know for certain why the lone attacker targeted a temple full of strangers.
"We have a lot of information to decipher, to put it all together before we can positively tell you what that motive is -- if we can determine that," Edwards said.
The attacker, who was shot to death by police, joined the Army in 1992 and was discharged in 1998. He was described Monday by the Southern Poverty Law Center as a "frustrated neo-Nazi" who had long been active in the obscure underworld of white supremacist music.
The attacker wrote frequently on white supremacist websites, describing himself as a member of the "Hammerskins Nation," a skinhead group rooted in Texas that has offshoots in Australia and Canada, according to the SITE Monitoring Service, a Maryland-based private intelligence firm that searches the Internet for terrorist and other extremist activity.
In online forums, he promoted his music while interacting with other skinheads. He posted 250 messages on one site between March 2010 and the middle of this year, and appeared eager to recruit others. In March 2011, he advertised for a "family friendly" barbeque in North Carolina, exhorting those online to attend.
"If you are wanting to meet people, get involved and become active, then you really need to attend," he wrote, according to SITE. "Stop hiding behind the computer or making excuses."
In November, the attacker challenged a poster who indicated he would leave the United States if Herman Cain were elected president.
"Stand and fight, don't run," he replied.
In an April message, the attacker said: "Passive submission is indirect support to the oppressors. Stand up for yourself and live the 14 words," a reference to a common white supremacists mantra.
Mark Potok, a senior fellow at the law center, a nonprofit civil rights organization in Montgomery, Ala., said the attacker played in groups whose often sinister-sounding names seemed to "reflect what he went out and actually did." The music talked about genocide against Jews and other minorities.
In a 2010 interview, the attacker told a white supremacist website that he became active in white-power music in 2000, when he left his native Colorado and started the band End Apathy in 2005. The band's MySpace page listed the group as based in Nashville, N.C.
The attacker joined the military in Milwaukee in 1992 and was a repairman for the Hawk missile system before switching jobs to become one of the Army's psychological operations specialists assigned to a battalion at Fort Bragg, N.C.
As a "psy-ops" specialist, the attacker would have trained to host public meetings between locals and American forces, use leaflet campaigns in a conflict zone or use loudspeakers to communicate with enemy soldiers.
He never deployed overseas in that role, Army spokesman George Wright said.
He was demoted in June 1998 for getting drunk while on duty and going AWOL, two defense officials said, speaking on condition of anonymity because they were not authorized to release information about the gunman.
The attacker also received extra duty and was fined. The defense officials said they had no other details about the incident, such as how long he was gone or whether he turned himself in.
Outside Fayetteville, N.C., a brick ranch house the attacker bought in 2007 with help from a Veterans Administration mortgage stood boarded up Monday with knee-high weeds in the yard. A notice taped to the front indicated the home was in foreclosure and had been sold to a bank in January.
Before buying the home, the attacker lived with Army soldier Darren Shearlock, his wife and young children in a doublewide trailer in a rural community near Fort Bragg, records show.
Shearlock, dressed in his military fatigues, declined to comment about the attacker or the shooting when approached Monday by The Associated Press.
Page's former stepmother said she was devastated to learn of the bloodshed.
"He was a precious little boy, and that's what my mind keeps going back to," said Laura Page of Denver, who was divorced from the attacker's father around 2001.
In Wisconsin, the attacker responded to a recent online ad seeking a roommate in Cudahy, a small city outside Milwaukee.
He rented a room in Kurt Weins' house in June, telling Wein he had recently broken up with his girlfriend and needed a place to stay.
Weins said the attacker stayed in that room all the time, declining invitations to watch TV with him. Several weeks later, the attacker rented an apartment in a duplex owned by Weins across the street. The attacker explained he wanted to bring some belongings out of storage.
"We talked, but it was really about nothing," Weins said. "He seemed pretty calm. He didn't seem like the type to raise his voice."
After the FBI searched the apartment in the duplex, Weins returned and found only a computer desk, chair and an inflatable mattress.
Suburban Milwaukee police had no contact with the attacker before Sunday, and his record gave no indication he was capable of such intense violence.
The FBI was leading the investigation because the shooting was considered domestic terrorism. The agency said it had no reason to believe anyone other than the single attacker was involved.
He entered the Sikh Temple of Wisconsin as several dozen people prepared for Sunday services. He opened fire without saying a word.
The president of the temple died defending the house of worship he founded.
Satwant Singh Kaleka, 65, managed to find a simple butter knife in the temple and attempted to stab the gunman before being shot twice, his son said Monday.
Amardeep Singh Kaleka said FBI agents hugged him, shook his hand and told him his father was a hero.
"Whatever time he spent in that struggle gave the women time to get cover" in the kitchen, Kaleka said.
With their turbans and long beards, Sikhs are often mistaken for Muslims or Arabs, and have inadvertently become targets of anti-Muslim bias in the United States.
Federal officials said the gun used in the attack had been legally purchased. The attacker was issued five pistol-purchase permits in 2008 in North Carolina, paying a $5 fee for each.
On Sunday, the first officer to respond was shot eight to nine times as he tended to a victim outside the temple. A second officer then exchanged gunfire with the suspect, who was fatally shot.
The six dead ranged in age from 39 to 84 years old. Three people were critically wounded, including the police officer.
Online records show the attacker had a brief criminal history in other states, including pleading guilty to misdemeanor criminal mischief after a 1994 arrest in El Paso for getting drunk and kicking holes in the wall of a bar. He received six months' probation.
He also pleaded guilty to driving under the influence in Colorado in 1999 but never completed a sentence that included alcohol treatment, records show.
The attacker was arrested on suspicion of drunk driving again in 2010 in North Carolina after running his car off the side of a highway. The case was dropped a year later for lack of evidence, according to court records.