. >> reporter: for "nightline," i'm mraul farpaula faris in new. >>> up next here on "nightline," we're right there on a raid in the depths of the amazon with cops on the hunt for ruthless drug gangs. what will they find? >>> and later, abc's david muir going one-on-one with sting. is it really true that he won't going one-on-one with sting. is it really true that he won't leave his kids any of his money? and for many, it's a struggle to keep your a1c down. so imagine, what if there was a new class of medicine that works differently to lower blood sugar? imagine, loving your numbers. introducing once-daily invokana®. it's the first of a new kind of prescription medicine that's used along with diet and exercise to lower blood sugar in adults with type 2 diabetes. invokana® is a once-daily pill that works around the clock to help lower a1c. here's how: the kidneys allow sugar to be absorbed back into the body. invokana® reduces the amount of sugar allowed back in, and sends some sugar out through the process of urination. and while it's not for weight loss, it may help you lose some weigh