i really don't see this happening, people have a tendency to over think things and i think that is what people are doing here.
1.fight between cindy/casey -June 15
2.casey kills caylee -June 16
3.casey disposes of body some time between June 16-18
4.casey arrested, released, rearrested, released again-july-august
5.JB hires DC
6.DC visits casey in jail, she possibly tells him a general local of the body-August (?)
7.casey arrested on murder charges-October
8.DC quits working for JB, starts working for the A's now that he knows she's dead-waits for things to quiet down before looking for a dead caylee (ie;too many LE, searchers and protesters around)
9.JH shows up and volunteers to work for the A's
10.DC narrows down a search area and calls in JH to help him
11.nosey? concerned? meter reader interested in the case, much like we are here, inserts himself throughout the months of aug, nov. dec..and has no relation to the PI's, the A's or Casey.
12.meter reader happens to find the body before PI's do, (too bad, so sad)
i really think it is that simple. (dates and order may not be exact, but you get the idea)
iF, this sting theory turns out to be true, then i really hope a movie is made because then this case would certainly be Oscar worthy!