When the number of kids locked up at San Francisco's juvenile hall reached record numbers last spring, Mayor Gavin Newsom ordered the population at the hall to be reduced and the city to recommit to partnering with community groups that work intensively with troubled youth while allowing them to live at home. Nine months later, however, executives with the Annie E. Casey Foundation, a leading private funder of such initiatives around the country, say the $587,500 it has given San Francisco since 2001 to help achieve that very goal has been wasted and that change is happening at "a snail's...