we'll have a live report from tennessee later in the broadcast. next to new york where a former cbs news producer who admitted to trying to blackmail david letterman over an office affair has been sentenced to six months in prison. robert halderman pled guilty to attempted grand larceny in march. he'll also serve 1,000 hours of community service. finally to washington, d.c., where a fourth person has been arrested now in connection with the killing of brian betts, a popular middle school principal. 18-year-old gray was charged with first-degree murder and armed robbery just a day after two other teens were charged with murder in the case. the mother of one teen is also in custody charged with two counts of credit card misuse. police say betts was set up for a robbery that turned into murder. it pushes us to work . to be better. to win. but sometimes even rivals realize they share a common goal. america's beverage companies have removed full-calorie soft drinks from schools, reducing beverage calories by 88%.