Any parent in the US if he or she chooses can give his or her kid a credit card to use (same with a debit card). While I would guess that a store cashier might look askance at a kid using on at checkout, a machine would not register any problem with the card simply by the fact a kid used it.
Again, I don't see that as a justification for what this DA is doing. Just noting that in the US legitimate credit card use by kids is possible.
