Final answer:
Dwight's serial killer nickname could be something like 'The Silent Surgeon' or 'The Crimetime Maestro'.
Step-by-step explanation:
Since the question is asking for a serial killer nickname, it falls under the subject of Arts where people often create fictional characters with unique names. Dwight's serial killer nickname could be something like 'The Silent Surgeon' or 'The Crimetime Maestro'.