Sandra Layne Case: Jury continues deliberations in Mich. grandmother's murder trial

Sandra Layne testifies in the Oakland County Circuit Courtroom of Judge Denise Langford Morris in Pontiac, Mich., Wednesday, March 13, 2013. The 75-year-old woman charged in the slaying of her teenage grandson said she shot him in self-defense because she feared the drug-crazed 17-year-old would harm her. (AP Photo/Paul Sancya)
Paul Sancya
Sandra Layne testifying in the Oakland County Circuit Courtroom in Pontiac, Mich. on March 13, 2013.
AP Photo/Paul Sancya

(AP) PONTIAC, Mich. - Jurors in suburban Detroit have been given a computer so they can listen again to a critical 911 call as they deliberate in the trial of 75-year-old Sandra Layne, who shot and killed her teenage grandson.

PICTURES: Grandma accused of grandson's murder

The jury must decide whether to convict Layne of first-degree murder or a lesser charge, or acquit her on the basis of self-defense. The first full day of deliberations began Tuesday in Oakland County, north of Detroit.

Prosecutor Paul Walton says there was nothing defensive about Layne's treatment of 17-year-old Jonathan Hoffman. He was shot six times last spring at their home in West Bloomfield Township, even while pleading for help during a 911 call.

Layne's attorney says she feared her grandson and felt overwhelmed by his drug use and choice of friends.

Complete Coverage of Sandra Layne on Crimesider