meaning the dna may have come from paul moore, but the scientists couldn't say it was a 100% match. yone else in the moore family, including peter, the fact that paul couldn't be excluded was nothing that would hold up in court. >> it was beyond frustrating. to hear that we have an almost match but we can't say for sure. >> still, it did give them an idea. they'd get one shot at it. might work. >>> coming up -- >> that got my attention right away. >> exciting doesn't begin to describe. elated maybe? >> most amazing thing in the world. this is the smoking gun. >> a killer, seemingly revealed by a blank sheet of paper. >> got chills going on in the back of my neck. >> when "dateline" continues. e back of my neck. >> when "dateline" continues [ heavy breathing ] allergies with nasal congestion overwhelming you? breathe more freely with powerful claritin-d. claritin-d improves nasal airflow two times more than the leading allergy spray at hour one. [ deep inhale ] claritin-d. get more airflow. shaq? remember when you were telling us to check out the general for car insurance, so we left

hick ey >> paul, going over to you, big name companies in favor of buy backs, talking about home depot, apple, microsoft, even jp moore dan. what kind of impact does that have on the companies and the broader market >> hi. when we look at buy backs, you tend to see two different -- you like to distinguish the buy backs, whether it's company funding the buy back with debt or using cash or the company whether the buyback is actually decreasing share count or if it's just offsetting the diluting impact of stock options. you often do see that in the tech sector and you saw it -- years ago you would frequently see that the buybacks wouldn't even be enough to offset the impact of stock options. as you mentioned stocks like home depot, apple, microsoft, jpmorgan and walmart, over the last ten years they've seen their share counts because of buybacks decline anywhere from 10% to 35% over the last ten years. so, those are companies where the buybacks are really making a difference and then as -- with respect to individual sectors, it was touched on earlier in the leadup to the tsegment, i think josh mentioned it, financials fi