Agree, and it is not just standard for a murder one case, it is the standard for crime scenes. The burden of proof is on the state, these are trained professionals paid for by the taxpayers, it is their crime scene until they release the property back to the owner. In most cases they don't know what charges will be related to a crime scene as usually the scene is found before a suspect is charged. Casey being charged does not give her some exemption.
It BAFFLES me that he does not seem to get that by insisting they have a right to be there he is confirming that this is Caylee's body, the location of which would only be known by the murderer. That damages his client.