for marcus singleton, this victory was bittersweet.himself. he knows he says that that may never come, but he hopes his mother would be proud that he finally spoke up. >> i try to live my life to make her proud of me. i'm never going to give up. never going to give up on anything that i feel is important. and -- >> and that's her. >> and that's her. that's living for her. that's honoring her and honoring her name. >> that's all for this edition of "dateline. " i'm craig melvin. thank you for watching. >> i'm craig melvin. >> and i'm natalie morales. >> and this is "dateline. " >> i couldn't believe it. the first thing out of my mouth was, "there's no way he did this". there's no way. they have the wrong guy. >> her mother was nearly killed by a bomb. >> i remember coming out to the truck, put in the key and then kaboom. the police told me this bomb was meant for you. >> they say to you, who does not like you enough to try to kill you? >> i could think of no one. >> but police could, and if the target was a surprise, so was