You and your neighbors keep an eye on your neighborhood. If you observe a crime or suspicious activity in your neighborhood, immediately report what you have observed to the police. Police respond to your call and investigate or apprehend the criminal.
Neighborhood Watch is a national program which unites law enforcement agencies, local organizations and individual citizens in a community-wide effort to reduce residential crime. Thousands of these programs have been developed around the county and is a remarkably successful anti-crime effort-neighbor looking out for neighbor.