Joel S. Finkelstein said he received an invitation this summer from his fellow equity partners to attend a meeting on the financial condition of the three personal injury firms they controlled.

He showed up for the June 10 meeting “in good faith and fully prepared to discuss the financial issues and problems of the law firms,” Mr. Finkelstein said in court papers. But when he got there, his key card did not open one of the doors at Finkelstein & Partners’ Newburgh offices. Mr. Finkelstein said he asked his younger brother, Andrew, for an explanation.