It is a general counsel's worst nightmare--the 8:00 a.m. call from a plant manager saying there are 25 federal agents at the office with a search warrant seizing the company's business records, taking employees aside to question them, and pulling samples from the plant's holding tanks and wastewater discharge. Having advised companies in those situations, here are several lists of best practices to take when law enforcement personnel arrive to execute a search warrant, what to do after they leave, and what advice to give your employees about their rights.