Oct 15, 9:56 AM EDT

76-year-old woman who killed grandson loses appeal

WEST BLOOMFIELD TOWNSHIP, Mich. (AP) -- The Michigan appeals court has affirmed the murder conviction and sentence of a suburban Detroit woman who killed her 17-year-old grandson.

Sandra Layne said her rights were violated when a judge barred her from introducing certain comments made by Jonathan Hoffman. Layne claims the words were threatening and would have helped her claim of self-defense.

But the appeals court rejected that argument in an opinion released Wednesday.

Hoffman was shot six times, including twice in the back, at Layne's home in Oakland County's West Bloomfield Township. Layne, now 76, was convicted of second-degree murder in 2013 and sentenced to 22 years in prison.

Hoffman was living with his grandparents during his last year of high school. Layne told jurors that she felt overwhelmed by Hoffman's troubles, including his drug use.

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