No, for what ever reason they wanted to quit the game....I don't think they wanted to "hurt" their team..but BKW instead. If they had just quit, they hurt their team mate(s), if they UDed like they did and their team mate(s) knew they were going to..that gave them to the oppertunity to but their votes on BH and or RB thus making them look "innocent" to the town, because they were voting what is now Known evils.
As for the case on HN...well, I think there was enough doubt out there already that any case brought up would not of looked random. I believe FULLY if Ogre had investigated Hooked and found him terrorist there would of been a much bigger push for him.