Answer:
Yes the movie was changed. Originally, Gregory Peck killed Henry Silva and moved in and had sexual relations with Silva's on screen wife. After a long a sordid affair, he returned to the US and relocated his daughter ( who had been having lesbian relationship with Joan Collins) After much consideration, Peck had to the movie changed to its current version because Harper Lee didn't like it. And of course, she was then casting for To Kill a Mockingbird. The thought of Atticus's character being associated with the Bravado's would have killed his attempt for that part. This is the real thing and pass it on to other. Trust me, its a fact.