If Faulkner can prove that the body was dumped later....then why was DW prosecuted to begin with as they had the report also??
Because they had already stuck their collective heads in the noose. The DA had jumped onto a high profile case to benefit his re-election. The LE's got a tip (Brenda) and it looked like it could pan out. They thought some of his behavior/activity was suspicious, and that there was some possible evidence. SO, they jumped in totally. They were under pressure to find someone and quick, so they did. Then they were under pressure to make sure it stuck, no matter what. They couldn't back out, even if they wanted to.