Where is the evidence that this title was written by the author of the article rather than just the poster of the article?

I'm not sure what you're asking. Clicking through to the Huffington Post article, the title is "How The U.S. Marshals And Bureau Of Prisons Are Trying To Break My Hunger Strike", and the last portion of the URI is

  how-the-us-marshalls-bureau-of-prisons-are-trying_us_586abd7be4b068764965c3af

This indicates that the Huffington Post article title hasn't changed, as generally URIs don't change even if article titles do.

As for the submission title original submission title "Aaron Swartz Redux -- The Man Carmen Ortiz Is Trying to Kill Next", that was submitted by the poster. See this comment from 'sctb when he updated the title:

https://news.ycombinator.com/item?id=13306320

Is this what you're asking? If not, can you clarify?

Thank you, this is exactly what I am asking and verifies that the _poster_, not the author, came up with the "Aaron Swartz Redux" title and that the author did not describe himself as "the next Aaron Swartz."

Excuse my pedantry.

The author doesn't, though he does bring Swartz up as part of his story.

"I was tired of explaining this whole travesty over and over again: from the troubled teen industry, to Justina Pelletier, Carmen Ortiz, the CFAA, and Aaron Swartz."