AUGUSTA, Maine (AP) — After being declared mentally competent, a 26-year-old Gardiner man pleaded not guilty to killing his father more than two years after he was indicted on a murder charge.

The Kennebec Journal reports Leroy Smith III denied the murder charge Thursday at the Capital Judicial Center and entered a second plea of not criminally responsible because of mental disease or defect.

Smith is the first person in the state to be forced to take psychiatric medication in an effort to restore his mental capacity so he could fully participate in his defense.

Prosecutors say Smith stabbed his father to death in May 2014 and then hid his dismembered body parts in the woods in Richmond.

Several health professionals have testified that Smith believed his father was poisoning his food.