The feud between Joel S. Finkelstein and his younger brother and former law partner, Andrew, heated up last week when Andrew claimed that Joel’s “abject laziness” and “flagrant acts of disloyalty” were the reasons Joel was terminated—allegedly for cause—from the three law firms managed by Andrew.

In papers filed in Manhattan Supreme Court, Andrew, 45, who is managing partner of Finkelstein & Partners; Jacoby & Meyers Law Offices; and Fine, Olin & Anderman, said that Joel, 50, had “failed to live up to his obligations as a partner” in each of the firms, which Andrew claims his brother viewed as “cash cows to be milked for all they were worth.”