Well, according to this news story, the body was not IN the pond, but near it. Sounds like a very recent (sorry for not finding better words to use) "disposal", since they are calling it a body and not skeletal remains.
Oops, I'm so upset, I forgot to post the link:
http://cbs11tv.com/local/body.found.child.2.1635329.html
Oops, I'm so upset, I forgot to post the link:
http://cbs11tv.com/local/body.found.child.2.1635329.html