That depends on how the leotards were knotted. Could she have hung herself with them? If so the police should be looking a low hanging branches for pieces of material. How would you explain the skull not being intact?
Wild animals try to eat everything, including brains which require opening like a turtle shell.
The DC police force may have become the Keystone Kops of the 21st century....but don't you think that even THEY might have noticed a body dangling from a tree while allegedly "searching" for a body? Forget it...I think I just answered my own question.