A dispute between Garth Brooks and a former employee has evolved into a highly acrimonious lawsuit that's headed to trial tomorrow at a district court in Nashville.

Brooks claims Lisa A. Sanderson owes him $226,000 for a loan he made to her as CEO of his movie and TV production company, Red Strokes Inc. Sanderson says the money was a gift. Sanderson's employment ended in December 2010 when Brooks shut down the company.

While most of the 100-plus documents filed in the case are sealed, in one memorandum Sanderson described her relationship with Brooks as an "extremely close personal friendship."