Why Khalil ur Rehman Killed Afzal and Shano in Drama

Killing Afzal(Hamza Ali Abbasi) in Pakistani Drama Pyaray Afzal wasn't Khalil ur Rehman Qamar's Idea He Said in His Recent Interview.
Khalil ur Rehman wanted to give Pyarey Afzal a tragic ending Though he had a wonderful ending planned.