(RNN) - The FBI is saying that Wade Michael Page, who killed six people at the Sikh Temple of Wisconsin on Aug. 5, killed himself.
Page shot himself in the head after an officer shot him in the stomach.
"The evidence indicates that the second responding officer who shot Page in the stomach, thereby neutralizing the threat – by the way I've seen the video; it was an amazing shot, and thank goodness – subsequent to that wound, it appears Page died from a self-inflicted gunshot wound to the head," said FBI spokesperson Teresa Carlson.
The FBI expressed concern that white supremacist groups may attempt to retaliate against the officer for shooting Page.
Misty Cook, Page's former girlfriend, has been charged with possessing a gun. She is a felon and therefore it is illegal for her to possess a weapon, according to South Milwaukee Police Lt. Jason Walker.
Officials do not believe she had anything to do with shooting at the temple.
"We have not identified anyone else, other than Wade Michael Page, as being responsible for these shootings," Carlson said.
The FBI and South Milwaukee Police interviewed Cook at her home and said that she was cooperative.
"The police officers, while there, observed the weapon, and they arrested her for felon in possession at that time," Carlson said.
Investigators do not know a motive for the shooting.
Page has been linked to white supremacist groups, and was the leader of a white power band called End Apathy.
According to the Pentagon, Page enlisted in the Army in 1992 in Milwaukee and was given a general discharge in 1998. A parachutist who received a commendation medal, Page received basic training at Fort Sill, OK, moved to Fort Bliss, TX, and finished his career at Fort Bragg, NC.
Page told neighbors that he served in the Army after Sept. 11, but he was not eligible for reenlistment. He received a general discharge because his service was marked by "patterns of misconduct."
Witnesses at the shooting said that Page had a 9/11 tattoo, but he did not. Page did, however, have many tattoos associated with the white supremacist movement, including a Celtic cross, also known as an Odin's cross with the number 14 in the middle.
The number 14 refers to "14 words;" shorthand for a sentence spoken by white supremacist David Lane. Lane was a founding member of "The Order," a white supremacist terrorist group.
Chris Robillard, who served with Page in the Army from 1995 to 1998, said on CNN's Piers Morgan that Page often spoke of a coming "race holy war," but he never thought he would become violent.
John Tew, a store manager for Harley-Davidson store in Fayetteville, NC, told CNN that he fired Page in 2004 because he had a problem with authority and working with women. Tew also said he had discovered an application for the Ku Klux Klan on Page's desk.
Mourners have been holding vigils for the past few nights to honor the five men and one woman who were killed; Prakash Singh, 39; Sita Singh, 41; Ranjit Singh, 49; temple president Satwant Singh Kaleka, 65; and Suveg Singh, 84 and one woman, 41-year-old Paramjit Kaur.
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