In Richmond, Virginia, the homicide rate dropped 32 percent in one year after the city installed its software in 2006.
Inflation is running at over 30 percent, the homicide rate has more than doubled since he took office, and food shortages abound.
It is hard to stand up the idea that Britain overall is getting more dangerous when the homicide rate is at its lowest in 19 years.
The homicide rate is higher than anywhere in western Europe except Finland, Belgium and indeed France (though Britain edges ahead of France when Scotland and Northern Ireland are included).
Youth homicide rates vary dramatically between and within countries.
Muggah says the survey shows homicide rates throughout Haiti also have gone down since 2007.
