It took a Lamb County jury about ten minutes to find 21-year-old Eduardo Ortega guilty of killing 24-year-old Ashley Parea in July of 2012.
Prosecutors said Ortega and Parea were arguing when Ortega shot Parea in the head. The defense claimed the shooting was accidental, and that the gun discharged during a struggle.
The punishment phase begins Wednesday.
Ortega faces five to 99 years, or life in prison.