It IS walkable, but what you are seeing is DAYTIME possiblility. There is absolutely no comparison as to what the area is like back there between daytime and night time. There is absolutely NO light back there and very rough terrain. The only people who would be able to accomplish this at night and leave no evidence (LE was all over that area within hours) would be somebody that knew the area by making a habit of being back there getting around at night. I don't think that includes DB at all. Just last night my dogs were barking at something back there and I could not even see 20-30 ft back there and there was nearly a full moon shining. If you were to be walking back along the creek, there is the tree canopy blocking out any possibility of any light and the leaves had not fallen yet much by then.Then you have to factor in the fact that it would not be fast at all and there are sticktights, nettle, poison ivy and just plain mud and water that would be very noticable to LE when they processed the house when whomever got back to the house. Like I have said, what looks good on google, is not reality of doing this at night. Even though the river is close, actually getting down to the actual water in the pitch black is not going to be easy nor quick at all. Google just does not show you the terrain and obsticles even in the daytime, let alone in the pitch black.
The area rapelled down at was not at the river. It was almost directly west behind the house just to the north of NE 34th & N Jackson.