Just an observation, I know I read that MSAR catalogued the clothing found on the beach by the sister because the tide was coming in and they didn't want to lose it. The sister was not alone in her search that day, she had professional searchers with her.
I also read that one of the sisters said Steven went searching down the path leading to the river by himself at his urging. When asked what the smell was, the article stated that a searcher ran ahead and said it was the carcass of a boar. No one went any further up river. Was the searcher Steven?
On 12/8/14 on the FCS facebook page, the mom wrote a tragic requiem saying the police showed her where Charli and Joshua had been and the mom and sister clawed at the earth, soaked in her blood where she lay bleeding. So that leads me to believe the police have a pretty good idea her body was there.