Back in the mid eighties in my Year 12 at school, I did work experience with the local police here in Queensland, Australia. Small town, probably only about 30,000 or so at that stage. Don't ask me how the teachers arranged it but I was spoken to by the the principal and nearly every head teacher under him before I went for the couple of weeks. The amount of crime I saw and read about through the reports was unbelievable. Real eye opener. Mostly small stuff but everything up to drug dealing and I heard the stories about retrieving bodies, etc. Tulsa pop is 400,000 at present, there'd be plenty of crime :)