Realistically, had Rob not been as suspect, I don't think LE would have seriously entertained the possibility that her body had been disposed of any time other than Tuesday night.
Absolutely correct; and the record will show, they never really did even after DD came forward.
Two very interesting facts emerge through the statement that RB provided on June 24th, 1990 - the first meeting with the homicide squad - and both should be taken into account in light of the fact that LE already had found the car and had thus two a half days to think about the car and its possible movement:
a) LE posited a scenario to RB during the interview in which they suggested RB committed the crime sometime Tuesday night and then later returned under cover of darkness to place EB in the car and drive it away;
b) In response to this, RB commented that LE didn't know how long the car had been there ('there' being Three 'R' Autobody) to which LE responded, "Actually, we know how long the car had been there."
Put a) and b) together and LE is essentially saying this: everything we have gathered both through witness statements and forensic evidence at this point tells us that the car didn't move after Wednesday and that if it was driven away, it was driven away Tuesday night/Wednesday morning; hence, DD being ignored for four months.
This can all be verified through the trial transcripts and LE had indeed already concluded by the time RB was interviewed that the car, if it was driven away, was driven away Tuesday night. But that posed a problem for the police and well before a witness came forward suggesting the car was seen a time when RB couldn't have been driving it. RB reported EB missing
that night to her mother before he could have driven the body out of the valley; in addition, he called MB from his own home and left a message on MB's answering machine asking him to call RB
anytime that night -- definitely NOT what one would do if planning or even spontaneously deciding to dispose of a body that night without anyone noticing that he wasn't home. Lastly, this confirms that AS, the dog walker, even if she
had casually mentioned to LE on June 22, 1990 that the car was missing on Thursday night, was not believed by the police at all.
We now know that as of three days after RB's arrest, LE were in possession of forensic evidence taking the theory that EB was killed on Tuesday night and her body moved 2-3 days after she was killed completely off the table; what remains to be seen is whether LE were in possession of any
forensic evidence negating such a theory
at the time RB was first questioned; if such was the case and they completely ignored it and went with the DD sighting knowing from the very get-go that their theory was bogus then things should get even more interesting.