What happens at the end of Prodigy?

What happens at the end of Prodigy? Miles enters and brutally attacks Margaret with a butcher knife, stabbing and disemboweling her. Sarah chases Miles outside to console him, believing Edward has left his body now that his final deed is complete. However, he reveals that Edward has taken full control, and Miles’ soul has already been vanquished.

Miles enters and brutally attacks Margaret with a butcher knife, stabbing and disemboweling her. Sarah chases Miles outside to console him, believing Edward has left his body now that his final deed is complete. However, he reveals that Edward has taken full control, and Miles’ soul has already been vanquished.