Mr. Fuller was also involved in a confrontation on Jan. 8, shortly before the attack on Ms. Giffords, which occurred at an event she held for her constituents outside a Safeway supermarket. He said in a long interview last week with The New York Times that he had argued there with a man he described as a former Marine after a heated discussion over politics. Gabriel Zimmerman, an aide to Ms. Giffords, separated the two.
Mr. Zimmerman was killed in the attack later that