police officer pressured to cover up killing of 92 year old
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Kathryn Johnston was shot 39 times as plainclothes narcotics officers busted into her house using a "no-knock" warrant on Nov. 26, 2006. During nearly eight hours of testimony, Arthur Tester said he was instructed by two other officers after the shooting to memorize a cover-up story that they had witnessed an informant buying drugs at Johnston's home.

Tester also told the jury in Fulton County Superior Court that he didn't know officer Jason R. Smith had lied to a judge to get the warrant and then planted drugs in Johnston's basement to back up the story. In his often tearful testimony, Tester said he eventually decided to cooperate with federal investigators because he "couldn't take it anymore."

"A woman was dead and they were trying to implicate me in their story," Tester said. "I didn't lay a hand on this woman. I wanted nothing to do with it."

Prosecutors say Tester had opportunities to tell the truth but decided to do so only when federal agents told him they knew he was lying.