Prosecutors say they will seek the death penalty against a man charged with wrapping a nylon strap around his girlfriend's neck and dragging her to death behind a car.
Jose Luis Rubi-Nava is charged with first-degree murder and second-degree kidnapping in the death of 49-year-old Luz Maria Franco Fierros.
He pleaded not guilty.
Rubi-Nava is a Mexican citizen.
His attorney has said he is mentally retarded.
Franco Fierros' mangled body was found in September 2006 in a quiet subdivision near Castle Rock, 20 miles south of Denver.
An autopsy report said she died from strangulation and massive head wounds.
Franco Fierros was also a Mexican citizen.
Douglas County District Attorney Carol Chamber said today the decision to seek the death penalty was made after very careful consideration.
She didn't address the defense contention that Rubi-Nava is mentally retarded.