Larissa Martinez, valedictorian at McKinney Boyd High School, kept her background a secret until she took the stage at graduation June 3. (Video: McKinney ISD)

]Subscribe:
https://www.youtube.com/user/tdmnvid?...

Watch more videos like this
   / tdmnvid  

Learn More:
Website: http://www.dallasnews.com/
Twitter: https://twitter.com/search?q=the%20da...
Facebook: https://www.facebook.com/dallasmornin...