Defunct law firm Chadbourne & Parke, trudging through discovery in a $100 million sex discrimination suit filed by three former partners, is handing over some of its most sensitive and confidential documents, including partner compensation information and the internal communications of the firm's management committee.

The plaintiffs say it's still not enough. They are asking a judge to order Chadbourne to submit more information to fully identify the scope of individual guarantees or other individually negotiated agreements used to pay partners before the firm was absorbed by Norton Rose Fulbright.

Meanwhile, a fourth potential plaintiff could enter the case, potentially giving the plaintiffs more leverage to reach a settlement. “An additional former Chadbourne partner” has recently come forward and is seeking to join the case, and if the parties can't “reach prompt resolution,” the plaintiffs will seek to add her, plaintiffs attorney David Sanford said in a letter Friday.