I was perusing the Wikipedia articles on the coup because I had recalled that there were unsubstantiated claims. There was a Wikileaks release, but it was essentially just an internal analysis that paralleled what had been said publicly.

I found this article from The Intercept. I would recommend reading the Wikipedia articles first because the article from The Intercept is quite biased, often omitting critical information that is unflattering to former President Zelaya. For example, they never mention that the referendum was likely illegal or that it was intended to do away with presidential term limits, which are a critical tool in preventing presidents from reaching a dangerous consolidation of power.