Three suspects arrested in rock-throwing death of Arvada woman

Courtesy of Jefferson County Sheriffs Office.
A flyer announcing a $17,000 reward for information surrounding the death of Arvada resident Alexa Bartell, 20, who was killed after she was struck by a rock that was thrown through her car windshield on Wednesday, April 19, 2023.

Update: April 27, 2:08 p.m.

Three teens accused of driving around and throwing large rocks at passing cars, one of which investigators say killed a 20-year-old woman, circled back to take a photo of her crashed car as a “memento,” according to court documents released Thursday.

Read more about what we learned in the arrest affidavits in this case in the latest update.

Our original story continues below.

The Jefferson County Sheriff’s Office has arrested three suspects in connection with a deadly rock-throwing spree last week.

Deputies took Joseph Koenig, Nicholas “Mitch” Karol-Chik and Zachary Kwak, all 18, into custody at their homes in Arvada Tuesday night, according to a press release. All three are suspected of throwing rocks into moving cars in various parts of Jefferson and Boulder counties the night of April 19. 

The group allegedly hit at least six drivers, injuring several and killing 20-year-old Alexa Bartell as she was talking to a friend on the phone. 

All three were arrested on charges of first degree murder and extreme indifference. The First Judicial District Attorney’s Office will determine their final charges. 

The sheriff’s office says it is no longer seeking additional tips from the public in the case.