3 teens arrested after Colorado driver killed by thrown rock

This photo provided by the Jefferson County Sheriff's Office shows Joseph Koenig who is facing a first-degree murder charge. Authorities say Koenig, and two other teenagers are facing the first-degree murder charges stemming from the death of a 20-year-old Colorado woman who was struck by a rock that investigators say was thrown through her windshield while she was driving. (Jefferson County Sheriff's Office via AP)

GOLDEN, Colo. (AP) — Three teenagers have been arrested on first-degree murder charges in connection to the death of a 20-year-old Colorado woman, who was struck by a rock that investigators say was thrown through her windshield while she was driving.

Alexa Bartell, of Arvada, was talking on the phone with a friend when she was hit by the rock northwest of Denver on April 19. After the call went silent, the friend tracked Bartell’s location with a phone app and found the woman dead in her car, which had crashed into a field, said Karlyn Tilley, a spokesperson for the Jefferson County Sheriff’s Office.

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