Right. PVDS had to have known the aurban authorities didn't have the equipment to search the place.
PVDS probably(ASSUMED) that area may never be searched with the proper equipment(BloodHounds). If Natalee is deposited there, PVDS will probably have a cardiac arrest on the spot. Good Point, Monkeywrench. NSNR
However, if jvds has DNA deposited on Natalee's body, that would not be inconsistent with what he has said. The only thing that I can think of that would be incriminating would be if there were wounds on jvds that indicated a struggle, and if this DNA were still able to be analyzed after this long, and in these conditions.