reporter: so she looked them up and learned about quinna jackson, just 20 years old when she disappeared five months before jerree's death. her mom is kathys. >> she was always a fun loving child, always made you laugh. >> reporter: just look at her childhood photos. that silly grin. she loved her dog, her little brother, playing softball. then it started happening. eighth grade or so. >> she was kind of getting typical you know teenage and mouthy. high school came getting around the older kids she kind of got a little worse. >> reporter: how'd you cope with that? >> just one day at a time. i loved her as much as i could. it was about the only thing. >> reporter: after high school, quinna went to high school about a three-hour ride from home. a year later, she moved to las vegas. but though far from home now, she got closer and closer to her mom. >> she would call me every day, text message. >> reporter: just a fun, loving daughter. >> yeah. i didn't think anything was happening. >> reporter: no idea. even in october, 2013, when she called to say -- >> she was on the bus towards santa ana. >> reporter: did she tell you why? >> visiting fr