Two Los Angeles firms held “front row seats” to a client’s financial mismanagement of a set of trusts and helped to manipulate evidence of the crimes, alleges a suit filed in California state court Wednesday.

The suit, filed against Am Law 200 firm Buchalter and Los Angeles stalwart Parker Milliken Clark O’Hara and Samuelian, revolves around the firms’ representation of Beverly Hills estate attorney Leslie Klein in a series of actions beginning in 2012, when he first faced efforts to remove him as a trustee. During the course of the cases, it was discovered he had purportedly embezzled $20 million from the trusts during the 30 years he managed them.