Earlier quoted context omitted.
They didn't prosecute "short selling", they prosecuted market manipulation: 1. Get a large short position 2. Publish damaging information 3. Profit It doesn't even matter if the information is true. If it is true, it is insider trading. If it isn't true, it is libel. Either warrants prosecution.
> If it is true, it is insider trading. No, it's only insider trading if the information is based on insider (AKA private) information. Anything that can be derived from public information, even with a stretch, is also considered public.
In this case, the alleged accounting fraud mentioned in the FT article was insider information.