Agent Samuel Hicks was shot about 6 a.m. in the middle-class community of Indiana Township. The 33-year-old was taking part in a drug-ring roundup at the home of Robert Korbe, who was taken into custody on the drug charge.
Korbe "ultimately called 911 to get local police to her house based on what she thought was happening," said Parker, adding that he is representing his client on state charges.
Christina Korbe was at Allegheny County police headquarters until Wednesday evening, when she was taken away on a stretcher crying with a white blanket over her head. She was put into an ambulance and taken to a hospital because she was feeling ill.
Her husband was one of 35 people charged in the 27-count indictment that accuses the defendants of conspiring to traffic cocaine and crack from October 2007 through September. Christina Korbe was not named in the indictment.
Robert Korbe appeared briefly in federal court Wednesday and was represented by a public defender but told the judge he planned to hire his own attorney.
He had told reporters at his home as he was being led into a police car that "they shot their own guy."
FBI agent William Crowley, an agency spokesman, said, "Based on the information we have right now, every indication is that no shot was fired by law enforcement at the crime scene."
Hicks had been with the FBI since March 2007. He was a former Baltimore police officer and school teacher with a wife and 3-year-old son.
"Special Agent Hicks made the ultimate sacrifice that any law enforcement officer makes for his country," Michael Rodriguez, agent in charge of the Pittsburgh FBI office, said in a statement read to reporters.
"He served with honor and bravery and will be greatly missed by his colleagues here in Pittsburgh and throughout the FBI," he said.
The last FBI special agent killed in the line of duty was Barry Lee Bush, who was accidentally shot and killed by a fellow agent outside a bank on April 5, 2007, in Readington, N.J., according to the FBI.
Bush, 52, of Forks Township, Pa., and other agents were in pursuit of three bank robbers who were armed but did not fire their weapons, authorities said.
Associated Press writer Joe Mandak in Pittsburgh contributed to this report.