I don't think Casey would have ever left if something had not happened to Caylee. They stayed the night there June 15 and that is the last time Cindy saw Caylee was when she put her to bed that night. There was never any official "I'm leaving" by Casey. Cindy got up and went to work the next day, the 16th, and assumed they were both asleep in Casey's bedroom. Something happened to Caylee that day while in Casey's care and that is why Casey left the house and did not return. She had taken care of the problem, and didn't have the guts to face what had happened and decided to just run from it. The child was never seen again by anyone. She bought as much time on the run as she could, telling her mom that CAylee was asleep, busy, at the bbsitters, anything to keep her mom at bay. She didn't even risk going home to get $ , that's why she was stealing from her friends.