Christy Robertson, shown on the witness stand Wednesday, was found guilty Thursday of attempting to murder her step-grandmother.

Christy Sue Robertson was found guilty on all counts by a Jackson County Circuit Court jury Thursday of trying to kill her 88-year-old step-grandmother at the victim’s Talent home in 2022 before stealing her car and leading authorities on a high-speed chase.

The jury of four women and eight men were convinced by the evidence that the 47-year-old had committed attempted second-degree murder, first-degree assault, second-degree assault and unauthorized use of a motor vehicle on May 30, 2022, when she beat and stabbed Geraldine “Gerri” Robertson and took her car.

“Thank you very much for your time,” Judge Timothy Barnack told jurors after he read the verdicts and polled them anonymously. “We know it’s been a long three days.”

The trial, which began Tuesday, was expected to last two days, but it extended into a third when the defendant decided to testify in her defense Wednesday, pushing closing arguments to the following day.

On Thursday, Deputy District Attorney Kelly Hager and Robertson’s defense lawyer, Jen Zammetti, gave jurors differing accounts of what happened that spring night last year.

Hager talked about how Robertson had been staying with her step-grandmother, who was suspicious at the younger’s behavior and asked her to leave.

“That made her mad,” Hager said, pointing to the young Robertson.

So, Hager said, Robertson waited until dark to commit her crimes — one sign her actions were intentional.

The deputy district attorney picked up the iron Robertson used to strike the victim in the head. Jurors had previously viewed the object as evidence at trial as well as photos of the battered Robertson in an ambulance with her eyes swollen shut.

“You all felt this iron before; you know how heavy it is,” Hager said. “No one picks this up and doesn’t know what they’re doing with it.”

She said Robertson came up behind her step-grandmother and stuck her with the iron, another act of intent.

But for Robertson, “The iron was not enough; she had to use a knife,” Hager said. The assistant district attorney noted the long scar on one side of the elder Robertson’s face.

“It’s a marker of what Christy did to her,” Hager said. “It’s going to be there for the rest of her life.”

What’s more, Robertson did not call 911 after the assault was committed, Hager said.

Hager noted that in stealing Geraldine’s car, Robertson was “trying to get as far away as she could” and even told authorities who caught her that she was Geraldine.

Hager said that back in Talent the night of the attack, the elder was terrified that Robertson was still in the home, so she hid in the bathroom all night.

When a family member found Geraldine the day after the attack, Hager told jurors, the elder could be heard saying, “’You’re getting your wish because I am going to bleed to death.’”

Jurors saw police body camera footage of a battered Geraldine, who told them the young Robertson was “crazy.”

“That is the best evidence in this case,” Hager told jurors Thursday.

Zammetti reminded jurors they had to find the state proved its case beyond a reasonable doubt that Robertson tried to kill her step-grandmother.

In trying to demonstrate that, Zammetti took aim at the elder, who had testified Tuesday that she thought Robertson would kill her.

Zammetti noted, for one thing, that Geraldine said she was told by her son that she was struck with the iron, whereas she testified she could not remember seeing it.

The brain bleed Robertson experienced as a result of being hit in the head with the iron would cause the elder to lose her memory of what actually happened the night of May 30, 2022, Zammetti said.

“It’s the little details (in this case), right?” she said.

Like Hager, Zammetti picked up the iron used as evidence at trial and dropped it.

“If (my client) threw this at (Geraldine’s) head, this would be a murder trial; not an attempted murder trial,” Zammetti said.

Zammetti also told jurors Geraldine could not identify the knife that left her with large cuts on her face and hand.

Zammetti left jurors with some thoughts regarding her client, whom she said had experienced trauma and drug addiction in her life.

“The truth is the truth — addicts just don’t make good choices,” Zammetti said. Which may have been a reason why Robertson stole the elder’s vehicle, the defense lawyer added.

“If she was trying to get as far away as she could, she would have gone to another state,” Zammetti said of her client, who was arrested in Coos County. “Christy told you she was trying to go to the water to get her head straight.”

The day before, Robertson had testified she was “sorry,” that she had always been on good terms with her step-grandmother and was not a violent person.

But Robertson was also shaky on key details about the incident, blaming her lack of memory on her drug addiction and a previous head injury. Robertson was also combative with prosecutors and at times questioned their inquiries.

The elder Robertson was not in court Thursday when the verdict was read. But Charlie Robertson, the elder’s stepson, was there and said he was not surprised by the verdict.

“She did it, and she’s going to get time in prison,” Charlie Robertson said.

Christy Robertson will be sentenced March 31.