Megan McArdle sums up the Rolling Stone/Jackie story.
The police were at pains to say that they don't know that nothing happened on the evening of Sept. 28, 2012, and that they are not closing the investigation, just "suspending" it, since they have no evidence with which to prosecute a crime. But what I took away from their press conference is that whatever happened on that night, it is almost certainly not what Sabrina Rubin Erdely wrote in Rolling Stone.
They wanted to help a cause.
They devastated it instead.