Wilmer Cutler Pickering Hale and Dorr is fighting back against a $13 million lawsuit alleging it was negligent in preparing the stock purchasing agreement between two former, embittered business partners.

The stock purchasing agreement between John DeBlasio and Thomas Charron led to a lawsuit one federal judge described as a “litigation bonanza rivaling Warren Adler’s ‘The War of the Roses.’” DeBlasio later sued Wilmer in April 2019, saying the firm’s negligence cost him at least $13 million in damages. Discovery is set to end in the case March 1.