The stakes have gone up.

Heller Ehrman’s creditors now want $150 million from former partners, contending in a confidential mediation brief that the firm fraudulently conveyed that much to partners after it had become insolvent. Meanwhile, a group of 89 former Heller partners said in their own confidential brief that they’ve hired John Keker of Keker & Van Nest to represent them if creditors pursue a fraudulent conveyance suit.