Yes my belief is being in a river and floating with the current and hitting tree branches, rocks etc will create wounds that would accelerate decomposition. Being placed in a waterway with little movement would not have the same effect.
That's where I am coming from with that thinking.
Detective Superintendent Dave Hutchinson said "it was very early days in the investigation, but police were of the belief Tiahs body was left at the river, just off Kirkin Road North near Jacobs Well, rather than carried downstream from another dumping site".
http://www.couriermail.com.au/news/...tiahleigh-palmer/story-fnihsrf2-1227600227745