 He responds by sending a message, through Lumen, that not only does he know about Dexter's motive for having contacted him, but he is also aware of Lumen's identity as the circle's escaped victim.With this, he enters the police station giving his DNA voluntarily (as he never touched them, only commanding and cheering the others on), and begins planning to destroy Dexter.He allows Emily Birch to identify the last attacker, Alex Tilden, knowing that Dexter and Lumen would execute him, planning to set them up to the police.