memphis. fellow teacher jesika moxley was in awe of the amount of energy miss jones poured into her classroom. >> heather loved being a kindergarten teacher. from the moment that they stepped foot into the door, to the moment that they left, they were dancing, they were singing, they were playing. >> reporter: by april 2013, it was all coming together for heather jones. on a saturday night, she hit that rumba room dance floor to try out some moves she'd picked up at the gym and to show the world what she'd become. >> it was just so much fun. we were probably there for about three hours just dancing. >> reporter: three days later on tuesday morning, teacher jesika moxley headed to school, expecting to see her energetic co-worker heather already there. >> our school day didn't start until 8:00 or 8:30 that year, and she was here every morning by 6:30, 6:45. >> reporter: heather usually couldn't wait for the school day to begin. so jesika was surprised by what she didn't see that...