David "Knuckles Dawson" Dreger was a former contributor to Rooster Teeth and, primarily, Achievement Hunter. With Achievement Hunter, he has appeared in multiple videos including AHWU, Trials HD Achievement Guides, and more. David also was credited for 'PFL Troops' in the Red vs. Blue series.
In May, 2014 Red vs. Blue season 11 episode 2 (Get Your Tucks in a Row) contained "In memory of David Dreger" prior to the video's outro.
“We are thankful that the prayers for discovery made by everyone during this time have been answered. It is with deep sadness that we must let you all know that David's body was discovered on June 20 near Ambleside Park. We would like to take this opportunity to thank everyone for their prayers, support and compassion. David was an exceptional, bright, caring and loving young man. We consider ourselves blessed to have had him in our lives, and are comforted knowing that he is now embraced in the arms of our Lord.”
— Love, Daryl, LeeAnn and Danielle. [Family of David]