A New York Times article seems to indicate so:

Recently filed court documents show that federal prosecutors in Manhattan may have begun to investigate the conduct of three law firms.

The documents - which surfaced in the bankruptcy case of G-1 Holdings, formerly the GAF Corporation, a manufacturer of roofing material - show that lawyers for G-1 have met with prosecutors from the United States attorney's office in Manhattan in recent months. The documents also show that the company's lawyers have turned over records of extensive interviews with former employees of the three plaintiffs' firms in which some employees described coaching potential claimants and noted efforts to influence doctors' diagnoses.

Two of the firms are Baron & Budd and Ness Motley, who we've had occasion to criticize in the past; our editor previously wrote about an earlier Baron & Budd asbestos scandal that sounds similar to this one. (Jonathan D. Glater, "Lawyers Challenged on Asbestos", NY Times, Jul. 20 (via Kirkendall)).