if this happened i would get rid of your grow. the cops have your number now and are not gonna leave you alone until the bust you for something. you embarrassed them, they had to put some effort and work into busting you and found nothing. this will not be the last you hear from them. oh and if they had a warrant you have a right to a copy of it, if they did not already provide you with one. so go see a lawyer, many will give you a free consultation, and request a copy of the warrant used on you. on the warrant will be the reason they gave for the search, what they were looking for, and who authorized the warrant. this is all info you have a right to and should be important to you. good luck