BOSTON - The music industry's courtroom campaign against people who share songs online is coming under counterattack.

A Harvard Law School professor has launched a constitutional assault against a federal copyright law at the heart of the industry's aggressive strategy, which has wrung payments from thousands of song-swappers since 2003.

The professor, Charles Nesson, has come to the defense of a Boston University graduate student targeted in one of the music industry's lawsuits.

Law professor fires back at song-swapping lawsuits (AP) by AP: Yahoo! Tech