This idea started with a summer of unusual criminal activity in my neighborhood. We had 17 break-ins in 23 days. We had neighborhood association meetings in which the police were involved. The activity subsided, but did not stop. I was getting information on the crimes by email, but always after the fact from the neighborhood association. This did not help with communication between neighbors or create any immediate awareness; there was no crime prevention. We decided to solve this pressing problem by developing a real-time communication tool for neighbors, by neighbors.