Deadly Rock Attacks Target Colorado Drivers, Killing 20-Year-Old Woman.

Alexa Bartell, a 20-year-old Colorado woman, was killed by a rock thrown through her windshield while driving home from work. The Jefferson County Sheriff's Office is investigating her death as part of a pattern of at least four rock-throwing incidents that occurred on the same night. Two minor injuries and damage to all the cars were reported in the other incidents. The authorities are ruling Bartell's death as a homicide and asking the public to check their home security or dashboard cameras for any information that may help track down the culprit.