A Gwinnett County woman pleaded guilty, but mentally ill, Tuesday to killing her husband at their home.

Hannah Chung, 67, admitted she shot her husband, Young G. Chung, 64, in July 2012, Channel 2 Action News reported. Chung’s plea also stated that she is mentally ill.

According to the news station, Gwinnett police responded to a cardiac arrest call but found Young Chung dead from a gunshot wound to the back of the head.

Hannah Chung has not been sentenced.