Tionda Bradley would have turned 20 years old Thursday. In the summer of 2001, she and her 3-year-old sister Diamond vanished from their South Side apartment.
Age enhanced photos show what the girls may look like now.
The family says they still hope to solve the heart-breaking mystery.
"There's no leads saying they're alive. There's no leads saying they're gone either. So it's so hard to determine. Rather, I feel that they're alive or dead because I don't wanna think of them being gone. But my heart has been telling me for the longest that they're still alive and somebody knows," said Elena Torres, aunt.
So far, police have made no arrests in the case.