By Hunter DeKoninck & Scott Brinks Most DEA Diversion Investigators  (“DIs”) are professional, knowledgeable, and committed to ensuring compliance in a collaborative way. However, every now and then, a registrant encounters a DI who may not only be misinformed about the regulations but is also condescending or unprofessional in how they conduct their investigation or interact with registrants and their employees. How you handle a difficult DI depends, in part, on the reason