The reason is that you cannot date them to a day.

Two to five weeks is a range, and in that range Esme Bellew was in the care of her mother, her father, both grandparents, and on one occasion an eighteen-year-old babysitter from three doors down who has never been suspected of anything by anybody.

You cannot prove beyond a reasonable doubt that a specific person did a specific thing on a specific day when the window is three weeks wide and has six adults in it.

Detective Bonaventura told me that in the March of 2023, before it happened, so that I would be ready.