CASTLE ROCK — A man accused of dragging his girlfriend to death behind a car may have scored low on an IQ test because he had trouble assimilating into U.S. society, not because he is mentally retarded, a prosecution witness testified Tuesday.
Jose Luis Rubi-Nava, 37, is charged with murder and kidnapping and could face the death penalty unless a judge rules he is retarded, as the defense maintains.
The mangled body of his girlfriend, Luz Maria Franco Fierros, 49, was found in September 2006 near Castle Rock. The defense has argued that an IQ test given to Rubi-Nava showed he was mentally retarded. The test was administered by a defense expert.
Psychologist Enrique Suarez testified that Rubi-Nava’s test results were improperly compared with random samples from the U.S. when they should have been compared with samples from Mexico.
