The Zaiger law firm faces a lawsuit after allegedly unethically firing William W. Bucher IV and refusing to honor contractual agreements that he says entitle him to 50% of case profits, including posttermination.

The defendants are Zaiger LLC, Jeffrey H. Zaiger, Black Diamond Capital Management LLC and Stephen Deckoff.

The Zaiger defendants are represented by David P. Atkins of Pullman & Comley, and Black Diamond and Deckoff are represented by Jeffrey Mueller and Mathew J. Letten of Day Pitney. Atkins and Mueller declined to comment.