When Peter Hain resigned he said that he was doing so in order to clear his name. However, if the response from the Electoral Commission to a Hain-related FoI request is anything to go then it's not looking good for him.
Back in Jaunary in the Daily Telegraph, Iain Dale wrote that the Electoral Commission had confirmed to him that it wrote to Peter Hain when his deputy leadership campaign began to outline his obligations and duties relating to the declaration of donations.
Since then a FoI request has been submitted to the Commission requesting a copy of that letter. However, the Commission has responded saying that the letter is now formally part of the Police investigation that is currently going on, and they also refer in their response to "detailed background material" that has been handed over to the Police.
The Commission also say that releasing the letter might cause "prejudicial media speculation" which seems to suggest that it is a key part of the case against Hain and they don't want to blow it by publishing the letter.
Like I say, it doesn't sound good for Hain.