I'm a homicide researcher in Chicago. There were over 4000 shootings and 769 homicides here last year. AFAIK, there were 0 swattings here.
So, I don't think it would be a good idea to set "assume it's a swatting" as the default response to 911 calls for service in response to violent crime. At least for Chicago.
So, I don't think it would be a good idea to set "assume it's a swatting" as the default response to 911 calls for service in response to violent crime. At least for Chicago.