Larry Wayne Marquardt
Larry Wayne Marquardt (Boulder County Sheriff's Office)

Larry Marquardt, who is accused of stabbing his then-92-year-old mother last November, pleaded not guilty by reason of insanity today, according to court officials.

Marquardt, 60, is facing first-degree attempted murder and first-degree assault charges -- both Class 2 felonies -- after investigators say he stabbed his mother, Verda, in the neck and shoulder at her home on Nov. 5.

According to prosecutors, Verda Marqaurdt knocked on her neighbor's door at Baldwin Place in northeast Boulder around 7 p.m. Nov. 5 while bleeding from her chest and neck, claiming her son, Larry, had tried to kill her. She was transported to Boulder Community Hospital with two stab wounds to her chest and one to her neck.

Police located Larry Marquardt in the area of Independence Road and 57th Street after he called dispatchers saying he had killed his mother.

In a video deposition, Verda Marquardt said her son kept saying, "You need to die," as he was assaulting her.

Marquardt, who remains in custody on $250,000 bond, will now undergo an evaluation and is scheduled for a hearing July 10.