1. you need to know what it takes to virus the police computers.
2. Hopper
3. Where's the canyon and is it in danger of filling with water? I'm not so versed in Florida's geography but it seems difficult. Any hurricane could fill it with water...
4. You need to know about each crime, and how to investigate it, as well as how the two investigators might have overlap together.
5. What does this town become from being so isolated? (that actually might be in the cultural setting)