Trish is the daughter of Henry's old captain. She also had an old rivalry with Shawn. Shawn used to tease her when she was a child and when she tried to throw a tennis ball at him at the zoo, she missed and threw is at an ostrich. The ostrich ends up chocking on the tennis ball but instead of getting into trouble, Shawn doesn't rat her out. She brings her dad to Psych because he solved a murder but due to Alzheimer's he can not remember who has been killed or who the killer is.