What do you think happend to Casy Anthony?

I have been thinking about this case for a while. I do think that her
mom is innocent.
Here are my theories
1. Boyfriend/baby daddy got mad at Caylee or Casey and killed Caylee.
Then told the mom that the same thing would happen to her if she did
not keep quiet.

2. She really did drown and Casey's dad (Caylees grandpa) is forcing
her to keep quiet.

Also if she is innocent then maybe she only got preggo so she would
not be killed... Also she may of been out at clubs to nub the pain of
someone killing her daughter right in front of her...

What do you think happened?
Oops for the title I meant to put "What do you think happened to
Caylee Anthony?"