In the series finale "The Truth", Skinner seeks Covarrubias as a witness in Mulder's trial for murder. After Skinner fails to track her down, the ghost of X hands Mulder a scrap of paper with her new address on it. She is called upon to testify, and speaks about her involvement with the Syndicate to some extent. However, when pressed for further information about the continuation of the conspiracy she clams up, and at Mulder's request is dismissed from the stand for fear that if she divulges certain knowledge, she would be killed.