Times-Herald staff report Vallejo police took a 12-year-old boy into custody on suspicion of assault with a deadly weapon after he reportedly tried to stab a Solano County social worker who paid a visit to see him and talk to his mother, Lt. Sid DeJesus said. DeJesus said the case worker was talking to the boy's mom about the "lack of progress he's been making and that upset him." He reportedly went into the kitchen, got a knife and charged at her but did not make contact. As police arrived, the boy ran outside, picked up his bike and attempted to smash the social worker's vehicle window but was subdued, DeJesus said.