http://www.sfgate.com/cgi-bin/article.cgi?file=/chronicle/archive/2005/02/06/EDGSMAPBHA1.DTL
"OAKLAND MAYOR Jerry Brown saw a pattern in the city's grim homicide statistics and decided to do something about it.
About half of the victims were on probation or parole. Most of them were shot at night, typically away from home. Those who survived were likely to retaliate in short order.
'If we could find a way to keep them home at night,' he observed, 'they wouldn't be getting shot.' "