Nassau police arrested the owner of a store in Plainview Tuesday and seized more than $40 million worth of clothing in what authorities called the largest counterfeit clothing bust they have ever seen. Detectives say they discovered an entire operation in the basement of Linny’s Boutique, where clothing items were being stamped with high-end names. The items were fakes, police say, and were being sold online and in the store by owner Lindsay Castelli, of Smithtown.