sentences:  In 2009, three years prior to CMED's filing for bankruptcy, an anonymous letter alleging possible illegal and fraudulent activities by management since 2007 was sent to KPMG Hong Kong, then CMED's auditor.In response, at KPMG's request, in 2009 the CMED Audit Committee retained law firm Paul Weiss Rifkind Wharton & Garrison to investigate the allegations and advise the committee as to any appropriate further measures.Paul Weiss as part of its investigation conducted on-site visits and interviews in China and collected documents from employees and servers of CMED.