_-do tthank you, a b-.ws sunday morning" starts in01 we'lc13 ee you then. >>> we're back on a sunday morning. not any sunday morning, my favorite sunday morning of the year, april fools' day. a little cooler in new york. and i want to thank the wonderful crowd for spending part of their sunday with us. keep going, get everybody in there! outside on the plaza, i'm jenna wolfe alongside lester holt. and coming up this half hour, talking about susan powell. >> yes, there's been new evidence that's come to light, or at least publicly come to light, and it leads to questions whether authorities in utah did enough to save the missing mother or her two sons. evidence shows powell's husband was a suspect in her disappearance from the start, and they had some pretty compelling evidence. so, why wasn't he arrested? we're going to look into that a bit further. >>> and then, we're going to talk about a little tech whiz. an 8-year-old boy -- this is actually a great story -- only 8 years old, but he used an app to track