Maybe because she had some loose ends to cut before she ran but the timing was off by one day.
YOU???
She didn't know Cindy was going to come bursting in.
If she was gonna head for CA, why leave Tony's wallet untouched? Why not hit his roommate's wallet another time, too?
Or maybe she thought Tony was going to propose after the video game?
I don't think Casey was ever going to report Caylee missing. I think she didn't think Cindy would find her. And she didn't expect Amy to discover her money missing for a day or so. She procrastinated. George said Casey took things to the edge.
IMO