ATLANTA, Georgia (CNN) -- Three former Atlanta police officers are to be sentenced Monday for their roles in the shooting death of a 92-year-old woman during a botched drug raid in 2006, according to the U.S. Attorney's Office.
The officers -- Jason R. Smith, Gregg Junnier and Arthur B. Tesler -- pleaded guilty to federal charges of conspiracy to violate civil rights arising from the death of Kathryn Johnston at her home.
Johnston was killed November 21, 2006, as the defendants and other police officers executed a "no-knock" search warrant that was found to be based on false information that illegal drugs were in the home.
Police initially said that Kathryn Johnston fired at them with an old pistol, and they shot back in self-defense.
Junnier, Smith and Officer Cary Bond, who was not charged in the shooting, sustained gunshot wounds in the incident. Tesler was not wounded.
An Atlanta Police Department spokesman an informant named "Sam" said he had bought illegal drugs at Johnston's home, west of downtown Atlanta.
Their story began to fall apart after the informant said he had never been to the home.
Neighbors and relatives said the raid had to have been a mistake. Johnston lived alone and was so afraid of crime in the Atlanta neighborhood that she wouldn't let neighbors who delivered groceries for her come in, they said.
The sentencing hearing is scheduled for Monday at 10 a.m. before Chief U.S. District Judge Julie Carnes, attorney's office spokesman Patrick Crosby said in a statement. He said the hearing could last two days.