Affidavit: 16-year-old admits attacking elderly Lefthand Canyon woman

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(Photo: Boulder County Sheriff's Office)

BOULDER, Colo. — The 16-year-old accused of nearly beating a 71-year-old woman to death told authorities he was “drunk as hell” and stoned when he tried to knock her out, according to an affidavit released Monday.

Boulder District Court Judge Maria Berkenkotter initially sealed the affidavit but reversed course and allowed for its release on Monday after putting a week hold on it so the defense could decide whether to appeal.

The affidavit details what led to the attack of Katie Kulpa at her Lefthand Canyon home after picking up Jeffrey Collins, 19-year-old Dakota Montgomery and an unnamed 17-year-old girl who were hitchhiking in the area on Sept. 19.

RELATED: Jeffrey Collins affidavit

Kulpa offered the three a place to stay until they could arrange a ride home after a camping trip.

Montgomery, who said he used heroin the night before, told investigators that Collins asked him “to help him assault Kulpa so they could steal her car,” but he declined to go along, according to the affidavit.

As they sat around a fire pit outside, Montgomery said Kulpa came outside and told them she found the teenagers a place to stay. As Kulpa turned away, Montgomery said Collins hit the woman in the back of the head with a fire poker, according to the affidavit.

The affidavit said Collins took “a full swing, one where Jeffrey put a lot of force and effort into the swing.”

The other two teenagers ran to a home about a half-mile away and called 911, then saw Collins getting picked up by someone driving a white hatchback.

After being arrested, Collins admitted to picking up the poker but didn’t remember what happened afterward.

When asked on a scale of 1 to 10 how hard he hit Kulpa, Collins said, “a six or something. I wanted to knock her out,” according to the affidavit.

Collins told detectives it was Montgomery’s idea to attack Kulpa, claiming Montgomery had said “let’s kill her and take her car.”

Collins is being held on a $1 million bond. He has been charged with attempted first-degree murder, first-degree assault on an at-risk person and two sentencing enhancements for the attack being a crime of violence.

He could face eight to 24 years in prison on the attempted-murder charge and 16 to 32 years in prison on the at-risk assault charge. He is scheduled for a preliminary hearing in February.

GoFundMe page for Kulpa has been established.