How does an attorney handle an appeal when there is no case law to base the claim on?

Edward Guedes, a partner at Weiss Serota Helfman Cole & Bierman, found out this week in the Fourth District Court of Appeal.  Guedes represented William B. Crosby, III.  Crosby sued the Town of Indian River Shores in the Nineteenth Circuit Court after the Indian River Shores resident and former pension board member got into a dispute with the town council.