I didn't know much about Truman Capote until I watched Capote starring Philip Seymour Hoffman. I learned that Capote bonded with Perry Smith, one the killers he profiled in In Cold Blood. I also learned that Smith was part Indian.
His mother, a Cherokee, drank heavily and beat him as a child. This abuse, the movie implies, clouded his mind as he attacked the Clutter family. He was perpetuating the cycle of violence begun in 1492.
So the crime happened and Capote wrote about it because of an Indian. He became the most famous writer in America and revolutionized nonfiction writing because of an Indian. The half-Cherokee Smith died, but his legacy lives on.