His theory was that non-fiction could be as artful as fiction.
Before Truman, journalism and non-fiction weren't taken very seriously.
Before Truman Capote, journalism and non-fiction weren't taken very seriously.
In the writing of memoirs, as in the production of shows, too much caution causes the audience to nod and think of other channels.
I don't think Capote loved Smith. But he did make a deep connection. It upset some people, because that had never been the approach to journalistic crime writing, to look into the mind of the killer.