Miami law firm Brown and Heller has suddenly shut down after losing its only client, a defendant in a class action lawsuit tied to Bernard Madoff’s monumental investment fraud.

After 38 years in operation, the law firm informed its 47 employees last week that it would be closing, and Monday was their last day. The lease on two floors at the One Biscayne Tower building, the firm’s home since 1975, expires April 30.