The alleged gunman who walked into Los Angeles International Airport Friday and opened fire with is unconscious and unable to talk because of several bullet wounds, including one in the face, from his shootout with cops.

Paul Ciancia, 23, is accused of spraying rifle fire at TSA officers and passengers near the security gate at LAX's Terminal 3 on Friday, killing one officer, injuring two other officers, and wounding a third man.

Ciancia was shot by police and taken into custody. According to documents filed by a federal public defender's office today, Ciancia is unconscious and unable to communicate. A public defender has not yet been appointed to Ciancia's case.

Also today, the Department of Homeland Security and FBI issued a joint intelligence bulletin to law enforcement across the country, urging them to remain vigilant for potential copycat shootings and laying out potential indicators of a coming attack. Federal authorities said they had no evidence suggesting an attack is coming, but issued the memo out of caution.

As part of the investigation into the shooting, police said that Ciancia legally purchased the rifle he used in the shooting, and brought a note with him to the shooting that said he was a "pissed-off patriot" angry at the TSA for violating people's rights with their searches.

Earlier, Ciancia's family had an attorney give a brief statement to reporters near their family home in Pennsville, N.J., during which attorney John Jordan said the family was "shocked and numbed" by what their son did.

Jordan said the family is cooperating with authorities in order to fully understand what happened.

"Paul is our son and brother. We will continue to love him and care for him," the attorney said on the family's behalf. "We hope the public will understand this is difficult time for our family too. The Ciancia family and their friends and neighbors need time to heal, so we ask that you please respect our privacy. "

Jordan said the Ciancias wanted to extend their sympathies to the family of Gerardo L. Hernandez, the TSA officer who was killed.

Two other TSA officers, James Speer, 54, and Tony Grigsby, 36, were wounded. A teacher named Brian Ludmer was also struck by a bullet and remains hospitalized.

"They wish to convey their hopes that those wounded recover," Jordan added.

The suspect was described as a loner by those who went with him to Salesianum high school, a private, Catholic all-boys school in Delaware. After graduating from there Ciancia attended a motorcycle maintenance school in Orlando and then moved to Los Angeles, where he worked as a repairman.

Federal prosecutors charged Ciancia with murder of a federal officer and commission of violence at an international airport. Both charges are potentially punishable by life in prison or the death penalty.

Police believe he acted alone.

This photo provided by the FBI shows Paul Ciancia, 23. (FBI/AP)