An Atlanta police narcotics officer has told federal investigators at least one member of his unit lied about making a drug buy at the home of an elderly woman killed in a subsequent raid, according to a person close to the investigation.

In an affidavit to get a search warrant at the home Nov. 21, narcotics officer Jason R. Smith told a magistrate he and Officer Arthur Tesler had a confidential informant buy $50 worth of crack at 933 Neal St. from a man named “Sam.”

But narcotics officer Gregg Junnier, who was wounded in the shootout, has since told federal investigators that did not happen, according to the person close to the investigation. Police got a no-knock warrant after claiming that “Sam” had surveillance cameras outside the Neal Street residence and they needed the element of surprise to capture him and the drugs.

The resident at the home, Kathryn Johnston, who is reported to be either 88 or 92, was startled by the sound of her burglar-bar door being battered in, and she fired her revolver at the officers. She was killed and three officers were wounded by gunfire or shrapnel.

Buddy Parker, a former federal prosecutor, said that officers who lied to the magistrate could face serious charges in addition to making false statements to a judge.

And if they lied, they should.