Overview

• A Colorado jury convicted Joseph Koenig of first-degree murder for throwing a rock that killed 20-year-old Alexa Bartell in April 2023.
• Koenig was also found guilty of attempted murder, assault, and attempted assault, with sentencing set for June 3, 2025.
• Prosecutors relied on testimony from co-defendants Nicholas Karol-Chik and Zachary Kwak, who pleaded guilty to lesser charges in 2024 and await sentencing.
• The trio threw rocks at multiple vehicles during the spree, and investigators highlighted their decision to circle back and photograph Bartell's crashed car without rendering aid.
• Koenig's defense argued he did not throw the fatal rock and cited mental health issues, but jurors determined he was complicit in the murder.