Perhaps that was also Michael's plan — to take all the blame on himself. Since he could not save himself, he might as well save the other one.
Thinking about it, Michael would also leave a person he trusted the most in the quality inspection department. Whether he had the power to operate in secret or not, it was not his own doing, so it was only natural that he was worried about others.
"Brie is devoted to Michael, so if Michael tells her to do something, she might do it. Moreover, Brie also has the motive to frame Cardellini Enterprise. After all, Monica also exposed her. It's easy for people to believe that she holds a grudge and was operating in secret!" Jeanne seemed to be mumbling to herself, but she also seemed to be asking Mason to help her with her deduction.
Mason did not say anything.
Usually, silence meant that there was nothing wrong with Jeanne's logic.