According to Fox News,
"Today would not have turned out the same without you being here, so from the class of 2018, we love you,” senior class vice president Emma Krull said from the stage. “You, Mark Dallas, are our hero, and we are all Dixon strong.”
Because of Dallas’ actions, 182 seniors were able to walk across the stage and receive their high school diplomas – each shaking their hero’s hand, and one, Dallas’ son, Josh, giving him a hug.
See more here
http://www.foxnews.com/us/2018/05/21/officer-gets-standing-ovation-at-graduation-for-stopping-school-shooting.html
To learn more about this shooting that happened during a graduation rehearsal and connections to bullying go here