具有追溯效力的证据(指发生在事后，但仍能证明被指控之行为者实施行为的证据)
O. when goods have been stolen, and the thief is sought, a person's later possession of those goods amounts to～that this person took them货物被盗，且盗贼尚未被捉获时，一个人在此后占有这些货物则构成该人曾盗窃此批货物的具有溯及力的证据