He opened it to confirm his presumption regarding Sarah's hair.
In case of doubt the presumption was in favour of the state.
Moreover, among the Jewish families settled in the 5th century B.C. in Egypt (Elephantine) and Babylonia (Nippur), the Babylonian-Assyrian principles are in vogue, and the presumption that they were not unfamiliar in Palestine is strengthened further by the otherwise unaccountable appearance of Babylonian-Assyrian elements later in the Talmudic law.
In spite of the mass of literature which has accumulated on the subject, neither his death in the Temple nor his escape therefrom has been definitely established, though a very strong presumption is established in favour of the latter.