Fighting for Aniah - Encore

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[MUSIC] When your sister and Nia dropped you off that evening, she did indicate that she would give you a call when she got home, correct? >> Yes, sure, she did. [MUSIC] Pure Hill, just the worst feeling ever to not know where your child is. [MUSIC] >> I mean, we were doing everything we could as parents in that moment to try to find her. >> 19-year-old Nia Haley Blanchard disappeared last week. >> Nia Blanchard was reported missing 11 days ago. There has been no trace of her since she- >> Blanchard is the stepdaughter of UFC fighter, Walter Harris. >> Whoa. [MUSIC] >> When she was missing, fighting was the farthest thing from my mind at that point. [MUSIC] >> We just want our daughter home, we want her found. >> If you have any information, please, please don't fall. >> I was almost a shell of myself, honestly, I didn't even know if I'd fight again. But she always was the one that was like, don't stop. >> That's it, keep pushing. >> Keep pushing, keep pushing, I know it's hard. >> Nice. >> Everything for me moving forward is about making her proud. I'm going to always fight for my baby girl. [MUSIC] >> She was a very happy girl that loved life. [MUSIC] Very loving and giving. [MUSIC] She always put others before herself. >> People could just really tell that she had something about her that was special. [MUSIC] >> There is nothing in my mind other than finding a knight. [MUSIC] >> You don't sleep, you don't eat your constantly thinking about where she is, what has happened, and it does not go away. >> We were just trying to keep each other sane so we could keep moving forward. >> So it was a constant go, go, go, we're not stopping. [MUSIC] >> So I have love you and love you, I'm not going to give up until I'm fine. Geez, we're going to bring you home and not if you're coming home, so don't worry. [MUSIC] [MUSIC] [MUSIC] [MUSIC] [MUSIC] [MUSIC]
Transcription truncated.
College student Aniah Blanchard had a deep fear of being kidnapped. When she disappears, UFC fighter Walt Harris battles for justice for his stepdaughter. CBS News special correspondent James Brown reports for "48 Hours."