Related על פסחים 2:2

The chametz of Gentiles is permitted immediately after Passover. Rabban Shimon ben Gamaliel and Rabbi Yishmael bar Rabbi Yochanan ben Berokah say, even consecrated [chametz] is permitted immediately after Passover.

The chametz of [Jewish] transgressors is permitted immediately after Passover, because they [are nonetheless trusted to] replace their sourdough [with the sourdough of Gentiles (see Minchat Yitzchak)]. [With respect to] provisions belonging to a Jew, or [a store belonging to a Jew with] Gentile workers who work inside of it, and chametz was found inside of it after Passover -- it is forbidden to benefit from it and, needless to say, to eat it.