sentences:  Monk believes that Herrin only recently escalated to murder and has been taking peoples' left shoes for some time.Monk explains to Natalie that he believes Bertrum Gruber to be even more dishonest than before, saying that Bertrum remembered the M567 in Herrin's license plate because it reminded him of his mother's birthday.Now if she was born on May 5, 1967, it means she would have been ten years old when Bertrum was born.