I'm curious. I have not heard a single thing about Theranos's downfall outside of the comments here on HN. Since you mention "press who broke ... stories", are there any articles out there that would also make me join the "Theranos is a fraud" crowd?
Issues with Theranos and the company's claims have been widely reported. One of the reasons there were discussions here on HN was that the news and articles that brought up these issues were submitted, voted up and then we all had a discussion on those articles and videos.
The WSJ reporting in particular has been deeply investigative where most of the rest of the media has just sniffed around at what appears to be a problem. Holmes' interviews in particular are some of the weirdest things I've ever seen, here's a fairly typical example: https://www.youtube.com/watch?v=A8qgmGtRMsY
Here's some examples of the media coverage of the company:
The Wall Street Journal has had the most to say about Thernanos from what I've seen. The most active Theranos threads on HN look like they are from WSJ artciles. Here is the thread for the first WSJ articles where I started seeing this story pick up steam if you are interested. https://news.ycombinator.com/item?id=10391313