There was so much flow on the river when I saw interviews. It looked fully in flood. They had searched the river hadn't they? It can take a couple of weeks for a body to surface should someone drown. Had so much experience of this happening as a boater, many, many missing person incidents that I can think of that ended in this way. Mostly accidental, someone slips and they are gone. A friend discovered one of the victims, a raver who had gone missing on the way back from a squat party and obviously fell in the river. Recently round here (W Yorks) a man was spotted half naked on a bridge one night by a witness who turned and then he was gone from her view. Two weeks later his body was found in a canal section, a couple of miles downstream.