I registered here just because of this case.
I never knew David myself, but he grew up with my niece, and he is the grandson of a friend of my mother's. The family is close and creative, and David likes to write science fiction. In fact, he was known to go off by himself for a few days at a time to write. However, it is unclear to me that he ever did this without informing his roommates or his family. It seems unlikely, and in any case, for him to go off without his keys or any gear signals something very wrong. I honestly suspect foul play and I do not think he, or his remains, is in that park. The whole situation is just terrible.