As he understands it, the plaintiff discovered the mouse in the pop some 78 days after the tin was sealed on the production line. On top of that, he believes the mouse or the infant rat - he’s not sure which - was only two weeks to four weeks old at the time of its death. He believes the critter was dead before it was placed in the tin. McGill examined the lifeless remains of the mouse. You’ve heard it here before you’ve heard it on a future episode of Mythbusters.