I do agree with Wudge though (imagine that.) Defense will try to use this video to show the LE incompetence, though I don't know that that will make any difference in the end result at trial.
That's the thing...even of you assume the worst case and LE totally blew it by not adequately following up on the MR calls in August...does that mean you throw out all the other evidence they have gathered? I don't think so. Missing a body is not police misconduct and does not "taint" all the evidence they have against Casey. So while it would be unfortunate if they missed out on an opportunity to find her sooner...it does not negate everything else. So I really don't see this as a major issue that changes anything. JMO