A grand jury Thursday decided a 14-year-old boy who shot and killed an intruder in his home Monday acted in self-defense and no charges were necessary. "I guess, as far as we're concerned, this was a completely justified shooting," said District Attorney Carlos Valdez. Valdez said details of the Ocean Drive shooting were presented to the grand jury for consideration in the same manner as any other case, which ensured fairness. "Any time there's a shooting involving the death of one citizen at the hands of another it is our policy to present it to the grand jury," he said....