what information does tiresias give us about himself and Oedipus?

Oedipus asks him to name the murderer. Teiresias initially refuses, and attempts to leave; Oedipus responds angrily, and Teiresias tells him that even his words “miss the mark” (325). “All of you here know nothing,” Teiresias says, and Oedipus furiously accuses Teiresias himself of being “complotter of the deed” with Creon (348). Teiresias tells Oedipus that Oedipus himself is Thebes’ pollution.