DETROIT (AP) >> A 16-year-old Detroit boy will stay behind bars on a $400,000 bond while awaiting trial on accusations he triggered a mob's severe beating of a suburban man who accidentally struck a 10-year-old with his pickup truck, a juvenile court judge ruled Thursday.Defense lawyer Solomon Radner argued that the bond was excessive and said his client, who's charged with intent to do great bodily harm and ethnic intimidation, is not a flight risk.