With the unbiased jury finally selected, the trial began on April 3, 1967. Out of the forty one witnesses that the prosecution brought into the courtroom, not one of them was more vital to the case than Cora Amurao herself. The sole survivor of Speck’s massacre, she gave the most important testimony out of all of the witnesses being the only living person having witnessed his atrocious actions. When she was brought to the witness stand, Martin asked her to point out the man who murdered her colleagues. Amurao hesitantly walked over to where Speck was sitting, pointed at him, and said “This is the man.” After a few more days of calling witnesses that gave evidence of Speck being the murderer, Martin and the prosecution team rested their case.