Conversation so far:
What is Homicide Life on the street?
Homicide: Life on the Street is an American police procedural television series chronicling the work of a fictional version of the Baltimore Police Department's Homicide Unit.
Did the publishers of Homicide: Life on the Street get a screen adaption of the book?
Yes, it was a TV screen adaption of David Simon's first book.

Question: What role did David play?
Self-contained rewrite: What role did David Simon play?