Man involved in rock-throwing death testifies against former friend

Rock-throwing trial: Co-defendant takes stand to testify against former best friend

Joseph Koening swiveled in his chair Friday morning as his former best friend, Nicholas "Mitch" Karol-Chik, took the stand in his first-degree murder trial to testify against him.

Testimony reveals holes in prior story of fatal rock-throwing incident

Joseph Koening swiveled in his chair Friday morning as his former best friend, Nicholas "Mitch" Karol-Chik, took the stand in his first-degree murder trial to testify against him.

CO v. Joseph Koenig: Rock-Throwing Murder Trial

Joseph Koenig is charged with first-degree murder in the 2023 rock-throwing death of 20-year-old Alexa Bartell. Bartell was killed on April 19 after a rock was thrown into her windshield while she was driving. (4/18/25)

Man involved in rock-throwing death testifies against former friend

One of the men who was in the car on the night that prosecutors say Joseph Koenig killed a woman by throwing a rock at her car, testified against him.

Truck used in deadly Jeffco rock throwing case was going over 100 mph: Witness

GOLDEN, Colo. (KDVR) — New details were revealed Thursday by a key witness in a fatal rock-throwing case in Jefferson County. That witness was one of three teenagers who were in a truck from which a rock was thrown that killed a 20-year-old innocent driver. Juror dismissed in deadly Jefferson County rock throwing trial that began Monday The witness walked jurors through the night Alexa Bartell was killed. Twenty-year-old Zachary Kwak descr…

Testimony reveals details of fatal rock-throwing incident which killed Alexa Bartell

Stone-faced and clad in an orange jumpsuit, 20-year-old Zachary Kwak sat at the witness stand in a Jefferson County courtroom Thursday ready to implicate his co-defendant on a murder charge.