I don't think it's all about the cost of searching the landfill. I think there are some concerns about searching but not finding Jhessye.
http://www.azcentral.com/news/artic...rs-challenge-proving-murder-without-body.html
If the other evidence GPD has is purely circumstantial and the strongest evidence would be finding her body there and they don't, what then? As convinced as I am that Jerice killed Jhessye and disposed of her, I understand the effect this could have for jurors. In the post CA era, reasonable doubt has a whole new meaning.
That said, AZ has successfully prosecuted a couple of "no body" cases. Jaime Laiaddee most recently ... http://phoenixcriminallawnews.com/2011/11/boyfriend-found-guilty-of-murdering-jamie-laiaddee.html
It's a horrible situation and heartbreaking to even entertain the thought that our Jhessye may be in that landfill but unrecoverable. I honestly do not know how Jerice can live with herself. I find myself wondering what she thinks and visualizes as she is drifting off to sleep each night. I hope it's like a movie in her mind that she cannot fast forward or turn off, I hope it tortures her in the worst way imaginable.