It wasn't just that she wanted to "party", but more that she wanted to be free to do whatever she pleased.
But would a mother deliberately kill her child just so she could be free? It would have been so easy for Cindy and George to take legal guardianship of Caylee. Does Casey hate her parents so much that she'd kill her baby before she'd let them take custody of Caylee?
I really think it was an accident, not necessarily a drowning, but chloroforming her to keep her asleep so Casey can party. And the chloroform and maybe the heat in the car killed her. Casey panicked, made it into a kidnapping and her defense team lead her to include Cindy, George and even Lee just to throw the focus off Casey.
I don't think I could vote premeditated murder.
They should call in John Edwards or Sylvia Brown, the people who can "talk to the dead". Not legal in court naturally, but just for everyone to know either way.