>> for justice. >> reporter: we talked to andrea and her mother, gianna constand, in new york, after cosby's conviction. andrea agreed to tell us the story she told in court, but speaking on camera wasn't easy. andrea, this is your first television interview. why did you want to do this? >> i think it's just an important time to -- to speak up and let people know who i am. >> reporter: she's an unlikely heroine. intensely private, humble. a massage therapist in her hometown, toronto. she's devoted to healthy living, the outdoors and her dogs. at 45 years old, she's calm, even serene. as a child she was anything but. you were runnin' around outside. >> i was outdoors -- >> reporter: playing sports. >> if it wasn't my mother or father trying to find me, then it was my grandma running out with -- >> causing trouble. >> with a hose tryin' to get me to come home and -- >> i was a really rambunctious tomboy. and -- >> really. she was like having six kids. and i mean it. >> reporter: by high school she was a star basketball player. >> she used to score 30 points per game. >> reporter: 30 a g

craig melvin: she spoke up and stood up, andrea constand, the first cosby accuser to get justice.ad three blue pills in his hand. and i said, what are those? craig melvin: she finally shares her story, her mom by her side, in her first interview. craig melvin: powerful details with a warning-- at times they can get graphic. i know it's hard to tell this story.