when things are unsolved, it doesn't need 10 events in order for the story to be complete, or the reason it took so long...
I remember an article Farflung posted on the DZ...an old man went missing..nobody had a clue where he went, or why...it turns out he was right under everyone's nose...he had a heart attack, drove off the road into some bushes and was concealed till city officials found his body while cutting the grass on the side of the road..all kinds of stories could of come from this, and a simple answer was the ending to the mystery...