PONTIAC, Mich. -

A prosecutor has again played for jurors a 911 call in which a Michigan teen tells the dispatcher that his elderly grandmother just shot him and then is shot again while on the phone.

Prosecutor Paul Walton said during his closing argument Monday that jurors should convict Sandra Layne of premeditated murder in the killing last May of her grandson, 17-year-old Jonathan Hoffman.

Walton says the murder conviction is warranted because Layne fired 10 shots over a six-minute span, striking Hoffman six times.

Layne says she shot the teen in self-defense after he demanded $2,000 and her car to leave the state.

The judge says the jury can consider first-degree murder, second-degree murder, voluntary manslaughter or involuntary manslaughter.

She faces life in prison without parole if convicted of first-degree murder.

Closing arguments are being heard Monday.

Layne sobbed while testifying last week.

She says she bought a gun to protect herself because her grandson brought strangers to the home late at night. Hoffman had a history of drug use.

READ: Woman accused in grandson's death: I was afraid

Jonathan Hoffman

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