Cops Seek Second Suspect, Say Giffords Gunman Didn't Act Alone UPDATE: Just a Taxi Driver

Tonight's weird new details: The alleged shooter walked through the crowd and directly to Rep. Gabrielle Giffords. "He ran through the crowd and when he got to [Giffords] he just started shooting," Pima County Sheriff Clarence Dupnik said.

 ABC News reports on the mystery "white man in his 50s" who may have delivered the lunatic to the congresswoman's rally and then disappeared:

"We are not convinced that [the gunman in custody] acted alone, there is some reason to believe he came to this location with another individual, and that individual is involved," Pima County Sheriff Clarence Dupnik said.

Police said a suspect was taken into custody, and Dupnik described the alleged shooter as mentally unstable. Though the sheriff did not name the suspect, he was identified by multiple law enforcement sources as Jared Lee Loughner, 22.

Dupnik declined to provide more information on the second individual who he would only describe as "white" and "in his 50s." Authorities have photographs of the person of interest and are "actively pursuing him," the sheriff said.

And then Sheriff Dupnik said this:

"The anger, the hatred, the bigotry that goes on in this country is getting to be outrageous. And unfortunately Arizona I think is the capital. We are the Mecca for prejudice for prejudice and bigotry," he said.

[ ABC News ]

UPDATE: It was the taxi driver who was called to drive the nut to the Safeway.