Here are a few.
1. Stand your ground law. Any lawful citizen in a place where they are lawfully allowed to be, does NOT have a duty to retreat and may protect themselves or others from deadly threat with deadly force.
2. Any lawful citizens, with training and vetting, that's is allowed by law to own or possess a firearm, may carry concealed or open, on their person, a firearm for self protection and defense of others.
3. Make penalties so unpalatable for thieves, drug abusers, and sexual predators, that is at least makes them take pause, about committing such felonies.
These things have worked in Many states in the US, and will work here to reduce crime and criminal violence.
Blood hasn't run in the streets, and the wild west was not rehashed.
IT WORKS