The Daily Camera reportsprosecutors are still deciding whether to file charges against the woman, identified as 21-year-old University of Colorado student Zoey Ripple.
Officials say preliminary tests indicate Ripple's blood-alcohol level was above 0.20 when she entered the home around 3:30 a.m. Wednesday. The man said Ripple ignored orders to leave and a warning that he had a gun. The man told police he fired after Ripple kept advancing toward him and his wife.
Authorities say Ripple has no known relationship to the residents.
A Colorado law allows homeowners to use deadly force if a trespasser in their home intending to use force.