Today Citizen Lab sent an open letter to Blackstone Group LP concerning recent reports that Blackstone is in talks to acquire a $400 million, 40% stake in NSO Group Technologies... We sent this letter in order to draw the attention of Blackstone Group to these these concerns, which we outline in detail. We also ask specific questions about Blackstone’s due diligence process for acquiring companies that sell spyware, and how they plan to address potential risks to investors...