What unusual and unexpected courtroom maneuver does Drummond make?

In the courtroom, Drummond unexpectedly calls the prosecution's key witness, Brady, to the stand, turning the tables on him. This maneuver catches everyone off guard as Drummond uses the opportunity to challenge Brady’s beliefs and the validity of his testimony, effectively placing him under scrutiny. By doing this, Drummond shifts the focus of the trial and demonstrates the weaknesses in the prosecution’s case. This tactic highlights his clever legal strategy and willingness to confront established norms.