NEW: Hundreds of high school students line the hallways of an Alabama hospital to say goodbye to their classmate as she heads into surgery to become an organ donor. 18-year-old Kimber Mills was shot at a party over the weekend. Mills was shot in the leg and head, allegedly by 27-year-old Steven Tyler Whitehead, after a fight broke out. Mills did not know Whitehead, who has since been charged with m*rder and three counts of attempted m*rder. The high school cheerleader was taken off life support on Tuesday. "Our sweet baby sister went to be with the Lord at 7:08 last night. She had the biggest gathering for Honor Walk the doc has ever seen," Mills' sister said. "She was and is so loved by so many. We will miss you, Kimber." Heartbreaking. RIP.