Great! Now explain to me how it took the local police to bring him down, not the MP, or any security unit on the base.
It was the Ft. Hood Department of Emergency Services police, not town cops. They are DA civilian employees, federal civil servants IOW. They act serve pretty much interchangeably with the MPs, although typically they have more training and experience, especially in law enforcement. Less in convoy protection or as guards for enemy POWs.