One by one they settled into the witness stand and then described, sometimes in harrowing terms, their shocking shared experience – large landscaping rocks crashing into their vehicles. “I just heard kind an explosion, almost, and then the windshield shattering,” William Smarr testified during the second day of Joseph Koenig’s first-degree murder trial. “That’s all I heard.” Read more at: https://www.9news.com/article/news/crime/rock-throwing-trial-koenig-alexa-bartell-testimony/73-4f6033b0-dd82-4425-98b0-0ec9a6499b25 More local videos here: https://youtube.com/@9news Subscribe to NEXT: https://youtube.com/@Nexton9NEWS Stay connected: 9NEWS Website: https://www.9news.com/ Facebook: https://www.facebook.com/ilike9news X: https://twitter.com/9NEWS Instagram: https://www.instagram.com/9newsdenver/ Download the 9NEWS App: https://www.9news.com/appredirect/ Sign up for the 9NEWSLETTER: https://www.9news.com/email 9NEWS (KUSA) is located in Denver, Colorado.