2nd teen pleads guilty in Colorado rock-throwing spree that killed 20-year-old woman

A second teenager pleaded guilty Wednesday in connection with a rock-throwing spree that claimed the life of a 20-year-old woman in Colorado.

On the night of April 19, 2023, Joseph Koenig, Nicholas "Mitch" Karol-Chik and Zachary Kwak allegedly threw large landscaping rocks toward cars, hitting seven vehicles, prosecutors said. Three people were hurt and one person -- Alexa Bartell -- was killed when her car was struck as she drove near Denver, prosecutors said.

PHOTO: Alexa Bartell, 20, was fatally struck by a large rock while driving near Denver, Colorado. (Jefferson County Sheriff's Office)
PHOTO: Alexa Bartell, 20, was fatally struck by a large rock while driving near Denver, Colorado. (Jefferson County Sheriff's Office)

On Wednesday, Karol-Chik pleaded guilty to second-degree murder, criminal attempt to commit first-degree murder and crime of violence, prosecutors said. The original 15 counts against Karol-Chik were dismissed as a result of the plea.

PHOTO: Damage to Alexa Bartell's car is shown after she was fatally injured by a rock, on April 19, 2023. (Jefferson County, CO Sheriff's Office)
PHOTO: Damage to Alexa Bartell's car is shown after she was fatally injured by a rock, on April 19, 2023. (Jefferson County, CO Sheriff's Office)

MORE: Teen pleads guilty in Colorado rock-throwing spree that killed 20-year-old driver

Karol-Chik was in the front passenger's seat that night and handed Koenig the rock that Koenig threw at Bartell, according to the Colorado First Judicial District Attorney’s Office.

Koenig, Karol-Chik and Kwak -- who were all 18-year-old high school seniors at the time -- were arrested about one week later on charges including first-degree murder with extreme indifference.

PHOTO: Nicholas 'Mitch' Karol-Chik listens  in Jefferson County court, May 3, 2023. (AAron Ontiveroz/MediaNews Group/The Denver Post via Getty Images)
PHOTO: Nicholas 'Mitch' Karol-Chik listens in Jefferson County court, May 3, 2023. (AAron Ontiveroz/MediaNews Group/The Denver Post via Getty Images)

MORE: 3 arrested for 1st-degree murder in Colorado rock-throwing incidents that killed 20-year-old driver

Karol-Chik faces between 35 and 72 years in prison, prosecutors said. His sentencing is set for Sept. 10.

Karol-Chik and Koenig also allegedly threw objects at drivers on Feb. 25, 2023, prosecutors said. On April 1, 2023, Karol-Chik drove while Koenig allegedly threw a statue head at another driver, prosecutors said.

PHOTO: Defendant Joseph Koenig listens to First Judicial District Court Judge Christopher Zenisek as Koenig is formally charged with first-degree murder, attempted murder, assault and attempted assault, in Jefferson County court, May 3, 2023. (AAron Ontiveroz/MediaNews Group/The Denver Post via Getty Images)
PHOTO: Defendant Joseph Koenig listens to First Judicial District Court Judge Christopher Zenisek as Koenig is formally charged with first-degree murder, attempted murder, assault and attempted assault, in Jefferson County court, May 3, 2023. (AAron Ontiveroz/MediaNews Group/The Denver Post via Getty Images)

Last week, Kwak pleaded guilty to three new charges: first- and second-degree assault and criminal attempt to commit assault in the second degree, according to prosecutors. Kwak's original charges were dismissed as a result of his plea, prosecutors said.

Kwak faces 20 to 32 years in prison, the district attorney's office said, and he's scheduled to be sentenced on Sept. 3.

PHOTO: In this May 3, 2023, file photo, defendant Zachary Kwak listens to First Judicial District Court Judge Christopher Zenisek in Jefferson County court, in Golden, Colorado. (Aaron Ontiveroz/Denver Post via Getty Images, FILE)
PHOTO: In this May 3, 2023, file photo, defendant Zachary Kwak listens to First Judicial District Court Judge Christopher Zenisek in Jefferson County court, in Golden, Colorado. (Aaron Ontiveroz/Denver Post via Getty Images, FILE)

Koenig has pleaded not guilty. His trial is set to begin on July 19.

2nd teen pleads guilty in Colorado rock-throwing spree that killed 20-year-old woman originally appeared on abcnews.go.com

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