Here's the link to HOW a headnote gets written:
http://lawprofessors.typepad.com/law_librarian_blog/2009/09/if-youve-ever-wondered-how-west-creates-headnotes-and-key-numbers-.html
http://lawprofessors.typepad.com/law_librarian_blog/2009/09/if-youve-ever-wondered-how-west-creates-headnotes-and-key-numbers-.html