West, 24, and another employee, her mother, fled to a backroom after the robbers came in and did not see the shooting.
Ersland told police he shot Parker five more times before he chased the other robber away. He later said he shot Parker five more times after chasing the other robber away because Parker was cursing him and getting back up.
But West acknowledged Friday she heard “absolutely no voices” inside the pharmacy after Ersland fired the first time until Ersland called 911.
Under defense questioning, she acknowledged she considers Ersland a hero who saved her life.
Jurors Friday saw photos of Parker's body on the floor. Prosecutors put the photos into evidence to show Parker was on his back and boxes of socks had fallen from a shelf across an arm.
Ersland, who lives in Chickasha, could be sentenced to life in prison or life in prison without parole if convicted of first-degree murder.
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