It seems now that Crashgate is confirmed as leaked transcript of the investigation interview with Piquet is available and reported widely. It's only a question of who is the culprit - was it Piquet or Flavio that suggested/instructed the crash. Either was, a deliberate crash was orchestrated and cheating happened at the 2008 Singapore GP.
Alonso has denied any knowledge of the planned crash, saying he was "shocked" to learn of this. Funny thing is, according to Piquet Alonso was put on an aggressive strategy where he would pit on lap 12 because the crash would happen on lap 13/14. This is what Piquet said:
"The key to this strategy resided in the fact that the near-knowledge that the safety car would be deployed in lap thirteen/fourteen allowed the Team to start Mr. Alonso's car with an aggressive fuel strategy using a light car containing enough fuel to arrive at lap twelve, but not much more.I wonder why didn't Alonso question that strategy call? Didn't he feel funny to be pitting in so early compared to the others? A driver with his caliber and experience was totally oblivious to it?