Answer:
No.
Explanation:
Defamation is not a crime by its definition, but rather a tort or a civil wrong. Written defamation is called a label and is referred to a statement that can hurt someone's reputation. In order to prove the existence of defamation, several things need to be verified:
The last one of these assumes that under some circumstances, victim cannot submit an appeal, even if it is possible to prove that the statement is false. This is the case with for instance witnesses in court, who cannot be sued for false testimony, due to freedom of speech, but can be prosecuted for perjury. In our case, three of four conditions necessary for sue to be made are fulfilled. The second one is not, therefore Tom cannot sue Jean for defamation.