Hello sir, we're performing an investigation. We accept cash, check, and credit card. Just hand us your wallet, sign here, and then realize you can't afford to hire a lawyer because we took all your money.
This happens, or something very similar. There have been multiple cases where someone faces charges and the government freezes all their bank accounts, preventing them from being able to hire a good attorney to defend themselves.
http://www.nytimes.com/2013/10/17/us/justices-weigh-freezing...