How can it be constitutional to extract your DNA, and then make you pay for it? That doesn't make any sense to me. What's next? Making you pay for your own jail

How can it be constitutional to extract your DNA, and then make you pay for it? That doesn't make any sense to me. What's next? Making you pay for your own jail time? If they want to make you do all of that, then they should pay for it. It reminds me of this recent story: http://www.policestateusa.com/2013/woman-probed-cavity-searched-x-rayed-reenter-usa/ http://www.policestateusa.com/2013/woman-probed-cavity-searc...