PONTIAC, Mich. (AP) — A suburban Detroit grandmother was convicted Tuesday of second-degree murder for killing her teenage grandson last spring, as jurors rejected her claim that she shot him six times in self-defense.

Sandra Layne, 75, cried quietly when she heard the verdict, which was delivered during the first full day of jury deliberations. She was also convicted of using a firearm during a felony and likely faces at least 14 years in prison.

Defense attorney Jerome Sabbota said after the hearing that Layne was "devastated" by the verdict. But Jonathan Hoffman's mother, Jennifer Hoffman, said her mother was a "monster" who deserves to go to prison.