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

The Boulder County District Attorney's Office on Thursday filed charges of attempted murder and first-degree assault on an at-risk adult with a deadly weapon against Larry Marquardt, 60, who police say repeatedly stabbed his mother in the chest Monday night.

Both charges are Class 2 felonies and could carry 8 to 24 years in prison apiece.

According to court records and witness interviews, Verda Marquardt, 92, knocked on her neighbor's door at Baldwin Place in northeast Boulder around 7 p.m. Monday bleeding from her chest and neck, claiming her son, Larry, had tried to kill her.

The neighbor called 911 and Verda Marquardt was transported to Boulder Community Hospital with two stab wounds to her chest and one to her neck.

Police went to her house next door at 4820 Baldwin Place, but were not immediately able to locate Larry Marquardt. While police were at the house, he called dispatchers and said that he "had been abused by his parents, and just stabbed and killed his mother," according to court records.

He also told dispatchers that he had walked to the area of Independence Road and 57th Street. Officers apprehended him at gunpoint at that location around 7:40 p.m., according to dispatchers.

Verda Marquardt underwent surgery Monday night and was no longer listed as a patient at Boulder Community Hospital on Thursday.

Larry Marquardt remains in custody at the Boulder County Jail on $250,000 bond.

He is scheduled for a preliminary hearing on Jan. 24.