We didn't have an FBI when the Constitution was written. You don't think we should have a national police? Just let the states handle it?
Not just NO, but HELL NO! When has one been held accountable for their misdeeds? We managed just fine through 1908 without them, it's just another fed pig trough to feed from, and as corrupt as any fed agency you care to mention. Make them accountable to those that pay them (US), and I'll reconsider. Blackbird.
Ypu have it EXACTLY right. Since the only CRIMES the Federal Government ia allowed to punish are Piracy, Counterfeiting and Treason, and since the Secret Service is already dealing with the second one, why not let them handle the other two as well? Disband the FBI, the BATFags, DEA, etcetera, and return crimefighting to the Several States and local governmnets, who can then make whatever agreements they need to, with the other States, to pursue criminals who flee or who commit crimes which go into more than one jurisdiction. As someone once said, ALL crime is LOCAL. Let the crimefighters also be local.