Garnett was a member of the military branch USCM (United States Colonial Marines) who is a part of a search and rescue team sent to the Zeta II Reticuli system aboard the USS Sephora to investigate the USS Sulaco in search of Ellen Ripley, Corporal Dwayne Hicks, and the rest of the missing marines who were dispatched to LV-426 19 weeks earlier. After the big explode on the bridge, Winter reaches Keyes and Garnett, they have been cocooned to the wall with empty alien eggs next to them, but only Keyes live.