MIAMI (Nov. 13) - Miami-Dade police have acknowledged using a stun gun on a second youngster just weeks after subduing a 55-pound first-grader with a 50,000-volt shock. In the second instance, a 15-year-veteran officer used his Taser to immobilize a 12-year-old girl who was playing hooky from school. Police Director Bobby Parker defended the decision to shock the 6-year-old boy on Oct. 20 because he was threatening to injure himself with a shard of glass he was holding, but he said Friday that he could not defend the decision to shock the fleeing girl, who was apparently drunk. According to...