Also, the presumption is that the system will somehow significantly reduce / eliminate the cost of investigation.
Maybe the guy shot doesn't die cuz they get there fast enough due to SS, therefore no murder investigation? ;)
But anyway, you would think that even if the cost of the investigation went down, the number of investigations and trials would go up, right? At least until all the murderers were behind bars...
Because I would say if secuirty cameras are not a deterrent to crime, the some unseen audio locator device sure as shot ain't gonna stop anybody!
And if they guy does die and SS is part of any circumstantial case against the shooter, I can imagine the expert testimony needed to validate the technology would drive the case cost even higher, just like DNA testimony did, esp. in its early days of adoption.