請老貓幫忙看看：structuring money transactions

前兩天有兩個detectives找到我，說他們正在調查我的banking activities。並且seize了我checking裏的$7K。因為我有幾次在銀行存取大額現金（ 我想問問這裏的朋友和專業人士有沒有這方麵的經驗。聽說structuring是crime，但是如果沒有跟illegal的活動牽扯，應該是不會被起訴的。Also I want to ask that if in the worst case, I do a plea bargin, will this jepardize naturalization process? (I got greencard 4yrs ago, haven't applied citizenship yet.)

Thanks a lot.