Colorado man guilty of first-degree murder in rock-throwing death of 20-year-old woman
Joseph Koenig, 20, was charged in the death of April 2023 death of Alexa Bartell


A jury found a man accused of killing a Jefferson County woman by throwing a rock through her windshield in 2023 guilty of first-degree murder.
Joseph Koenig, 20, was on trial in the killing of 20-year-old Alexa Bartell, along with several other crimes related to a weekslong rock-throwing spree.
The jury reached its verdict after deliberating for about seven hours. First-degree murder carries a mandatory life sentence in Colorado.
All three defendants in the case — Koenig, Nicholas “Mitch” Karol-Chik and Zachary Kwak — were 18 at the time of the crimes. Both Karol-Chik and Kwak took plea deals and testified during Koenig’s trial.
This is a developing story that will be updated.