So this one actually took about 15 minutes, but it does look like at least as of December of 2017, David Hogg was indeed a senior at Marjory Stoneman Douglas High School.
http://eagleeye.news/feature/msd-senior ... l-youtube/" onclick="window.open(this.href);return false;

How interesting is this, that the link you have given is from the "eagleeye news.

State Of The Nation

OPERATION EAGLE EYE; The Code name for the St. Valentines day Massacre

http://stateofthenation2012.com/?p=95666#more-95666" onclick="window.open(this.href);return false;