Mary Boyd was waiting in her car for her daughter when she was shot in a NorthPark Center parking lot during an attempted carjacking.
Stuard's defense attorneys say their client was at the crime scene that night but did not shoot Boyd.
Boyd, who needed facial reconstruction surgery, testified Tuesday in Stuard's trial.
"I will never forget that face," she said.
Boyd saw the faces of Stuard and Wallace on the news after they were charged and identified Stuard as the shooter.
But defense attorneys said it taints her testimony.
"The fact that someone was already arrested is suggestive to her that, yes, they got the right person," said Kenneth Weatherspoon, Stuard's lawyer.
Sentencing begins Thursday.