I do not mean to sound callous because we have all lost our favorit plane at one time or another and it always sucks. But, honestly, it really wasn't the best judgement to take the second flight after experiencing the "loud" rudder flutter. The simplest explanation is usually the correct answer. I would not be surprised if the earlier flutter weakend the entire aft end of the aircraft causing elevator failure, etc. Anyway, I am sorry for you loss. The good news is that this is a perfect excuse to get a new jet!