Slander and Libel

If I have to choose who would be guilty of either slander or libel in scenario number 2,

"A teenager posts a blog about an ex-boyfriend, listing several of his personal and physical flaws. The ex-boyfriend responds by posting a blog of his own that states several untruths about the person who posted the original blog. Both parties' parents sue each other for defamation of character."

This case is considered to be libel, rather than slander, because slander is where you speak it, whereas libel is usually in print. The case consisted of two teenagers whom were previously in a relationship and both publicly posted false, personal information about each other on the internet. In this case however, the female was the one who originally posted the false information about her ex-boyfriend, which is why I find her guilty of this charge. This reason I don’t find the other defendant guilty is because the things that he said about his ex-girlfriend were posted simply out of self-defense.