An individual wishing to file a claim for slander would file a complaint in either the Superior Court of the appropriate jurisdiction or the "small claims" court of the appropriate jurisdiction if the amount in damages does not exceed $7,500.
Here's in an online copy of a very useful book that would assist you in representing yourself: http://books.google.com/books?id=9G6OCtL9BSEC&pg=PA162&lpg=PA162&dq=guide+to+f illing+out+pld-pi&source=bl&ots=aMu0LjSdCE&sig=pKk4wtP1qIeP6qiHXoaCAlm-HQI&hl=en&ei=QWtdTrL5B63UiAKcysizBQ&sa=X&oi=book_result&ct=result&resnum=2&ved=0CCEQ6AEwAQ#v=onepage&q&f=false
You must bear in mind that in order to prevail on a claim of slander, you will need to demonstrate not only that a false statement was made about you, but that it was a statement of FACT, not merely a statement of opinion. For example, "Jane is incompetent" would be a statement of opinion because it is subjective. However, "Jane stole all my files" would be a statement of fact because it is either true or false.
If you are interested in hiring an attorney, certain attorneys may be willing to take your case on a contingency fee basis. This means that you typically don't have to pay unless and until you win your case. For attorney referrals, visit this link: http://apps.americanbar.org/legalservices/lris/directory/main.cfm?id=CA
On MartinDale, you can search attorneys by their practice area.
When you contact the attorneys, ask if they offer free consultations. Most should, and this way you can get at least some opinon on your case before you spend money.
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