marcus singleton: im never going to give up. im never going to give up on anything. craig melvin: hello and welcome to dateline. for marie singleton, the sun rose and set on her boy marcus. when the single mother met andre jackson, a solo dad with two kids of his own, marie thought she had found the man of her dreams - and a father figure for her son. but that new life shattered when marie suddenly vanished, and police discovered there was a lot more to this mom -- and her marriage -- than met the eye. here's josh mankiewicz with "missing marie." josh mankiewicz: secrets. we all have them. some are small.... some large. some, professional... others ... very, very personal. this is a story about secrets... about a woman who was very good at keeping them... and about what happened when that woman ... suddenly ... disappeared. marcus singleton: she was beautiful. my mom was really beautiful and a great person, a nice person. josh mankiewicz: as a little boy, marcus singleton couldn't possibly foresee the loss he'd suffer... or the terrible choice he'd one day have to mak

marcus singleton: i love you more. no, i love you more. more. thats the kind of stuff a kid never forgets. craig melvin: she was the single mom who kept him safe.

marcus singleton: i try to live my life to make her proud of me. i'm never gonna give up, never gonna give up on anything that i feel is important. and-- josh mankiewicz: and that's her? marcus singleton: and that's her, you know, that's living for her. that's honoring her and honoring her name. craig melvin: that's all for this edition of dateline. i'm craig melvin. thank you for watching. >> good morning, and welcome to this sunday edition of morning joe weekend. here are some of the conversations you might have missed from this past week. >> let me ask you the question that a lot of people would ask, and people ask me. after i talked to him earlier last year, how was he? how was he physically? how was he mentally? how how how was he as far as his attitude goes? >> so a 55 minute interview that's pretty long for a presidential interview. he was engaged and lively. he was loquacious. he answered every question i posed, some of them with reflection, some of them with some defensiveness. he, you know, he looks older than he did the last time i inter