Ramiro Jaime Reyes (defendant) was seen reaching through the open window of a truck owned by Michael Conlon in the middle of the night. Reyes was later stopped for speeding, and when the police searched the vehicle they found property belonging to Conlon. Conlon confirmed that the property was stolen from his truck, but was unsure if he had left the window of the truck rolled down or not. Conlon was charged with vehicular burglary and receiving stolen property, but the burglary charge was dismissed because there was no evidence that the truck had been locked. At trial for the receiving-stolen-property charge, Reyes provided evidence of his long history of substance abuse and his intoxication on the night of the incident. Reyes also sought to introduce a psychologist’s testimony that his history of substance abuse and mental illness showed that he lacked the required element of knowledge that the property was stolen. The trial court disallowed the testimony as inadmissible because receiving stolen property was characterized as a general-intent crime rather than a specific-intent crime.