Venable LLP and a former partner in the firm’s Los Angeles office are facing renewed allegations of fraud in a civil suit stemming from their representation of a convicted con man who is serving time in federal prison for scamming early investors in Facebook.

In an amended complaint filed last week in Philadelphia federal court, New York-based plaintiffs attorneys accused the national law firm and its former partner, David Meyer, of knowingly vouching for their client’s fake identity in the scheme, which diverted more than $11 million meant to buy private-market shares in Facebook.