Jurors in suburban Detroit have gone home after less than two hours of deliberations in the trial of a 75-year-old woman who fatally shot her teenage grandson.

The jury got the case Monday after attorneys delivered closing arguments in the case against Sandra Layne.

Jurors could convict Layne of first-degree murder or a lesser charge. But they could also acquit her based on her claim that she killed her 17-year-old grandson, Jonathan Hoffman, last May in self-defense after he struck her during an argument.

Prosecutor Paul Walton says there’s no evidence to back up that assertion. He told the jury that Layne deserves a first-degree murder conviction because she shot at Hoffman ten times during a six-minute span, hitting him six times.