The 'Brain Surgeon', Miami's latest individual serial killer murdered more than three people. One of the suspects for this case was A.J. Yates, Vogel's former patient. Yates had a signature marking carved into the back of his skull, precisely where the 'Brain Surgeon' cuts open his victims. On episode 8.05 "This Little Piggy" Dexter kills Yates with a curtain rod in front of Deb and Vogel. Was Yates the real 'Brain Surgeon', or not? Vote below!