Where a court-appointed mental health expert assures a criminal defendant that the evidence gathered in his psychological evaluation will not be used against him as evidence of guilt at his capital trial, does the State's subsequent introduction of that evidence against him exceed the scope permitted by the Fifth Amendment as set forth in Estelle and its progeny?

Where a court-appointed mental health expert assures a criminal defendant that the evidence gathered in his psychological evaluation will not be used against him as evidence of guilt at his capital trial, does the State's subsequent introduction of that evidence against him exceed the scope permitted by the Fifth Amendment as set forth in Estelle and its progeny?