1: I don't know what time she died, I'm not a psychic and not comfortable getting into specifics like that.
2: I don't believe Annette's story. I think Annette has doubts about Ron's innocence and that is why she told him on the phone, after his arrest on dealing drugs to watch out for snitches. I think Annette lied, to give Ron an alibi. She is covering.
3: Yes, I still do believe Chelsea's theory that Haleigh died from an OD. Except I don't believe that Haleigh got into a stash and died. Instead I think Misty got into the "stash" and Misty gave Haleigh the pills. With that theory that Chelsea put out there, she was protecting Misty, by putting the blame on Haleigh, that Haleigh is the one who voluntarily took the pills. I also believe that Ron got rid of the body. I think Misty (possibly accompanied by others) met Ron somewhere, and he snuck out of work and threw the body into a body of water.
4: I don't think Haleigh died at shell harbor, I think she died at the mobile home. I think at the time, LE did find some evidence that Haleigh was thrown into the river, and believed that Misty's/Tommy's story RE Joe had merit. I think LE then discovered that while "some" of their story may be true... BUT that they were lying about WHO got rid of the body and WHO killed the child. Either because they don't know and were guessing, or lying to cover their own butts. Most likely a little bit of both.
Right now, I think if police want to get to the bottom of what happened, and I think they are excellent and dedicated detectives... I would be leaning heavily on ANNETTE SYKES, TERESA NEVES, CHELSEA CROSLIN, and TIMMY CROSLIN. I think they had minor roles of covering things up.
At this point Tommy is tained and anything he says isn't credible, same as Misty. Unless they can pass a polygraph, they can't be trusted.