In the first public data security class action complaint against a U.S. law firm, Chicago-based Johnson & Bell was named in a lawsuit that says the firm failed to protect confidential client information.

The suit against the 100-plus lawyer trial firm was filed in Chicago’s federal court in April but made public on Friday following courtroom fighting over whether or not the firm had patched security holes a former client claimed existed in the firm’s time entry system, email system and virtual private network.