. students still in the hospital this hour after yesterday's terrible shooting at a high school in suburban colorado. and now we're learning more about the possible motive of the 18-year-old shooter, carl pearson, who investigators say may have been targeting one specific teacher. will, what's the latest? >> well, greg, right now, authorities are interviewing hundreds of students find out everything they can about 18-year-old carl pearson. students say that he was smart. they say he was a gifted debater. they also say he was very outspoken politically. authorities say that pearson went into arapahoe high school yesterday carrying a shotgun. he was evidently looking for a specific teacher, a librarian who also coached the speech and debate team. now, apparently the targeted teacher found out that pearson was looking for him and the teacher left quickly. pearson came into contact with a