Well, think about it...
Would the Loudoun County Government hire private security to walk their property or would they just use the cops they are already paying.
Like most large shopping centers... they are private property.
In actuality.. I do not know of a single shopping center that is OWNED by the local government.
So in regards to the Dullas Town Center...
Is it "open" to the public? Yes.
Is it public property? No.