Joseph Koenig, 20, was found guilty of first-degree murder in the death of 20-year-old Alexa Bartell Jefferson ... with his big smile on his face.” 3 Arrested in Rock Attack that Killed 20 ...

A Colorado man was convicted of first-degree murder-extreme indifference in the death of 20-year-old Alexa Bartell ... Related: 3 Arrested in Rock Attack that Killed 20-Year-Old Colorado Woman ...