Where is LE saying they collected more dirt? Please post link and proof. Maybe one bag had dirt but the other did not! (Please look at the female officers bag - from more than just one photo!)
When they first covered the csi van in front of the anthony's on fox... reporters were scrambling to figure out what they were doing in the yard... they said they stuck their cameras over the fence and all they saw was what looked like digging and taking some dirt. I'm guess they were saying from what they could tell with the cameras sticking over the fence.