They arrest your money. You are not accused of a crime, your money is. Your money is not a person, and thus has no constitutional rights. Your money is not innocent until proven, that's a silly system reserved for persons - instead, your money must prove its innocence. And thus you get cases with absurd titles such as "United States v. $84,740.00 U.S. Currency" ( https://casetext.com/case/us-v-8474000-us-currency )
I'd love to say you can't make this up, but they did.