Unobtrusive

Capote, the movie, (orh yes, it's highly recommendable) portrays Truman Capote as not just a vain reporter, but one who gets heavily involved, personally as well as financially, in the story he's covering.

[15:35-- Hmm, when I say financially involved I'm thinking of Capote taking some action to influence the legal proceedings, offering some sort of support, pulling some strings, but actually I don't remember the details as to whether or not money was involved.]

All the more striking is his self-portrayal in writing. This is how obtrusive he gets (and I suppose it's him though he doesn't even use the first person singular) - and this is how much he lets readers in on the explicit subject of his field work - after more than 300 pages:

'That was a cold night,' Hickock said, talking to a journalist with whom he corresponded and who was periodically allowed to visit him [on Death row]. 'Cold and wet. It had been raining like a bastard, and the baseball field was mud up to your cojones. So when they took Andy out...