so it was only fitting diane was there the night heather fell instantly in love with a guy named chris jones. >> heather went to a new year's eve party on 1999. and she came home, and we sat down and talked and giggled about this new guy that she had met, chris. >> reporter: diane recalls that heather found chris fascinating. >> he dazzled her with his knowledge of wine and just his -- his knowledge of the world. >> she liked that? >> she loved that. she absolutely loved that. >> reporter: diane was surprised to see how fast the new couple was moving. within weeks heather and chris were living together. not long after, diane noticed a change in her cousin. a big one. >> they got very involved in a lot of online gaming and some things like that. and so they had a very, very sedentary lifestyle. and so that's when she gained, i would say, about 250 pounds. >> 250 pounds over how much time are we talking about? >> maybe a year and a half. i mean, it was a very short amount of time. >> that's life-changing. >> it was tough. >> did she seem depressed about the weight gain? >> absolutely, yes. >>

>> reporter: when heather jones, the newly svelte, newbie teacher, didn't show up for her kindergarten class in memphis that morning back in april, 2013, alarm bells went off among her fellow teachers and friends. >> heather would never miss a day of school, she was totally dedicated. >> reporter: home sick? it didn't seem likely. best friend melissa smith knew heather wasn't about to be sidelined by a little sniffle. >> there was no excuse for her not to be there. >> reporter: school officials couldn't reach heather on the phone, and when her cousin diane heard she was a no-show, she headed right over to heather's house in germantown, where she saw an encouraging sign. >> there was relief when i saw the car in the driveway 'cause i thought she was there. i thought, "oh, she's sick." >> reporter: diane thought heather was probably just sleeping. >> knocking, knocking, knocking. please answer the door. >> reporter: but no answer. alarmed, she called heather's mother to bring over a key. soon germantown police arrived, opened the door, and went in first. >> they say, "she's not in there.

in the sultry darkness of the rumba room, bodies sway to the in april 2013, a woman named heather jones came in with her friend to dance the night away, wearing a brand-new news. >> how did she look that night? >> she had her head up so high, and her shoulders back and just beaming she felt absolutely beautiful. >> reporter: there was a time not too long ago when heather didn't feel very beautiful at all. but on this evening, she had the night of her life. >> she reay very much. she was being spun around and danced. >> reporter: just two nights later, everything spun out of control. >> breaking news about a missing germantown teacher. >> reporter: heather jones suddenly and inexplicably disappeared from her home. >> her car is in her driveway. her purse, keys and cell phone are missing. >> thinking of her being scared and hurt made you sick. >> reporter: what happened?

heather: all right, dr. tom jones sharing personal memories today. thank you so much for joining us. jon: not only was john glenn the first american to orbit the earth, he was a world war ii pilot and served 24 years as u.s. senator representing ohio. ahead we will talk with fellow astronaut and senator who made the assad announcement on the floor that john glenn had passed away. plus a break in a missing person's cold case, what police think happened with navy wife mother of two h ever? heart healthy california walnuts. the best simple dinner ever? heart healthy california walnuts. great tasting, heart healthy california walnuts. so simple. get the recipes at walnuts.org. because it knew an ordinary wastissue was near.ar. the fiery tissue left her nose sore and red. so dad slayed the problem with puffs plus lotion, instead. puffs have pillowy softness for dakota's tender nose. with lotion to comfort and soothe when she blows. don't get burned by ordinary tissues. a nose in need deserves puffs, indeed. now get puffs plus lotion in the squeezable soft