They should be spending their time looking in water. More specifically a lake. I have done extensive analysis for something known as Reverse Speech on Drew Peterson. In my findings he makes 2 references to water including one he calls a lake. By his reversals he has indicated he used his plane to dump her body.
Note:Reverse Speech is messages from the unconscious mind embedded backward into speech.
(In and interview on The Today Show he is asked the option of being presented with the circumstances of his third and fourth wife as a cop, would he think it is coincidence or he his guilty of at least one murder.)
I'd have to evaluate the whole thing and I really can't even respond to that.
I left an option in the lake. You've gotten in this whole hot area I will say that.
(The option for him is murder, and that option has been put in a lake. He has revealed a specific type of body of water where Stacy is.)
Web page to hear all of Drew Peterson's reverse speech examples:
Stacy Peterson