emma walker. a bobcat cheerleader since sher freshman year at central high. >> she was a really good cheerleader. some of them would just go through the motions but emma would put her own kind of sparkle into what she would do. >> fellow cheerleaders kelsey and lauren say their friend could be sassy, too. >> and she said i am kind a big deal. >> and i take it she said that with a hint of sarcasm. >> yes. >> people who didn't know her, they were like oh, she's super pretty cheerleader. oh, no. but then they would meet her and be she's the nicest person i ever met. >> her long time school friends. >> once you got to know her. wow, she's a down to earth person and really sweet. >> she had a smile that could light up the room. a big, beautiful smile. >> emma's parents jill and mark say that infectious smile was the hallmark of her playful personality. >> she likes to play jokes on me. grabbing my iphone, and taking selfies of herself. i have no idea. >> emma volunteered at an animal shelter. at school