Calling local authorities is the best way to help. Your calls provide law enforcement with data to make decisions like when and where to deploy patrols. It also helps them identify trends.
When you report any suspicious activity, describe specifically what you observed, including:
If there is an emergency, call 9-1-1.
In addition, you can also help by spreading the word to those around you. Share these useful resources with your neighbors, coworkers, and friends.