Carrie Bishop is Veronica Mars' former schoolmate who was notorious for spreading rumors at Neptune High.
After Veronica and Duncan Kane broke up, she told her friend Susan Knight that Duncan was mentally ill, and Veronica overheard them gossiping in the girls' bathroom.
In Mars vs. Mars, she claimed that she was seduced by their History professor, Chuck Rooks. It is later revealed that it was actually her friend, Susan, who had been having a sexual affair with Mr. Rooks. Susan told him that she was pregnant, was disowned soon after and was avoided by Rooks, who had already moved on and was flirting with other girls. Carrie then made the claims to get justice for what Rooks did to her friend, who could not bring herself to press charges against him.
Although Carrie and Veronica never got along before, Veronica was impressed by Carrie's bravery to step up for her friend, and Carrie seemed to have developed a new found respect in Veronica, realizing that she had helped her and Susan against Rooks in the end.
Carrie was again seen and mentioned in A Trip to the Dentist attending Shelly Pomroy's party. She was talking with Shelly when they witnessed Cassidy Casablancas apparently running out of the guest room and throwing up. Years later, Veronica follows this up and asks Carrie about it while at her job, and Carrie tells her that she saw her in bed with Duncan Kane and closed the door for them.