For the first part, I don't think any young girl would stay in prison to protect her "lover." How fleetingly those first young loves pass. Just look at her and WBG. I think Misty would do anything to get out of there, but she would have to offer up herself as an accomplice.
To address the second past: No theory I have can be written in stone. However, I do not think the MH on Green Lane was where the crime/accident/rage took place. I think Misty picked Haleigh up from the bus stop and drove toward Magnolia Lane. RC found out, and still infuriated over the past weekend, madly drove after her. Either HC hit her head in the car during the chase, or they got to M. Lane and RC & MC got into a fight and little Haleigh got in the way, was injured and died. Or, perhaps RC was swinging his gun around and it went off accidently. If, this is what happened, and if they had called 911, gone to the police, they wouldn't be in as much trouble as they are now. This is my strongest theory.
But there are many others; the Mexicans, the drug "lords" in Putnam County (laughing it this.) Yeah, the degree of sophistication down there would not drug lords make.
If HC were in a coma or some sort of life altering problem, then perhaps Eliza was called in to evaluate the seriousness of the situation.
I truly believe TN and GGS were called in and made the final decision of where and how to lay to rest little Haleigh. I think RC's father and uncle were called in to take care of the final arrangements, because TN couldn't and probably did not want GGS to do that deed.
I don't know to what degree the Croslins are involved all this, however, I wholeheartly feel that they know most of what went on. Except one thing, they don't know where Haleigh is and they never will. MOO
And I don't mind if this is picked apart. I've picked apart every theory I've come up with.