http://www.cnn.com/2001/US/07/27/levy.map/
Here's a map of the Rock Creek Park and where the remains were found in relation to Levy's apartment and other relevant spots. I'm not sure who really knows about this park.. but its big, thick (in terms of bush, trees etc. ) and it's completely intertwined with neighborhoods, major thoroughfares, and small backstreets. It’s not really continuous and it’s not your common neighborhood park that’s isolated with limited access points. Being from this area, there’s truth to the myth that you can get lost in there for days.
When I first heard that the police was searching the park, I personally believed that it was an impossible task.
My theory: I think that her body was dumped there after the police gave up searching… especially when they stopped looking in the park.