No, because Carl has the right to freedom of the press in the 1st amendment and technically he did not do anything illegal. So Stella does not have a valid case of libel.
Answer:
In legal acts adherence to law is mandatory while in ethical acts it is voluntary. Ethical acts can be seen on a daily basis in smaller spheres as well (even in children), but legal acts are not seen in everyday life. Legal and ethical both aspects are mandatory for functioning of proper society.