Tina McManus is the girlfriend of contracted murderer Frank Kemp. She met Kemp at a club and shared habits of recreational cocaine dosage.
When Kemp was arrested, Kemp's lawyer Larry Teasdale tried to manipulate and coerce her into providing a false alibi for Kemp when he was taken to trial for the murders of three people. She still worked with the police to set the attempt up to be recorded, leading to Teasdale's arrest and Kemp taking a plea. (L&O: "Severance")