STOCKTON An assistant youth football coach who rushed onto the field and tackled a boy on the opposing team was charged with misdemeanor child abuse on Thursday and had a bench warrant issued for his arrest after he showed up late for his arraignment. Cory Petero was initially arrested on a felony charge, but prosecutors decided to pursue a less serious misdemeanor charge because the youth wasn't seriously injured and Petero doesn't have a prior criminal record, Deputy District Attorney Xapuri Villapudua said. "The injuries to the child were very minor," said Villapudua, noting that the boy suffered sore ribs...