Law professors in no way need to be practicing attorneys, though many are. Deans of law schools don't even need to have a license to practice (as was seen a few years ago when Stanford's dean went to get licensed again and failed the CA bar). However, working as an attorney will give you good experience that you can pass on to your students.
In reality, law schools will care more about your publishing record when making a hiring decision than your professional record (barring a Larry Tribe-esque resume). While in law school, sign up for a journal and see what types of articles are published. Take any opportunity to write a scholarly article (or note) and try to get it published. That will help you find a position as much as any work experience will, though it's still a tough world to crack into (especially if you're not from a top law school).
And on a personal note, I took classes with many practicing attorneys, former practicing attorneys, and others who had never stepped inside a courtroom. All in all, there was little correlation between their qualities as a teacher and their experience as an attorney.
Hope that helps.
highly unlikely that you'll get anything b/c these types of cases are hard to prove
a few months ago, my aunt slipped on water in a wal-mart, falling and breaking her collar bone and left shoulder (there was not wet floor sign posted) but b/c it was her word against wal-mart's-she was unable to seek damages.
i'm sorry to hear what you are going through but unfortunately, these cases are just too hard to 100% prove blame on wal-mart's account.