I thought the special dive team searched a mile downstream.To be fair to them, they did only search that specific area LE pointed them to. They did say that she could be found further down the river. They have since came out and said that if they had been made aware of her vulnerabilities at the time, it would have changed their search pattern.
Would that not cover this part where the body was found? (bearing in mind it may have moved further down since the search)