Rita "Lethal Weapon" Westwood was a villainess in episode 3.07 "Talk Derby to Me" of Psych.
She was portrayed by Mickie James.
Rita was part of a group of evil roller derby girls who were robbing department stores at night. She was encountered by Juliet, who went undercover as a roller derby player, but while searching Rita's locker, hand scanners were found, revealing Rita's role in the robberies. After the revelation, the evil Rita drove to a marina and dumped a mannequin inside, unaware that she was followed by Shawn and Gus. The marina was also revealed to have contained much of the merchandise stolen by Rita and the rest of the team, with the discovery was made by Lassiter. Rita ended up killed by teammates Fox and Wilde, who were upset that they were found out by the police.