BEagle:
If the a/c really did enter the RW at Taxiway Delta, why did the tower not query it? The Delta entrance is almost directly outside the tower window.
Why would they use Delta anyway? On a 24 departure, assuming 103T loaded and not tankering, would they have planned to roll directly from Echo without backtracking?
Other than that... wait for the tower tapes... IF this is the area where there was a problem, at least a partial answer should be forthcoming fairly quickly...
R1