Seventeen-year-old Claire Davis had been in critical condition after being shot at point-blank range at Arapahoe High School on Dec. 13. Friends and well-wishers had been posting prayers online and raising money to help pay for her medical care.
Arapahoe County Sheriff Grayson Robinson says Davis appeared to be a random target.
Authorities say 18-year-old Karl Pierson was likely targeting a librarian who had disciplined him when he entered the school with a shotgun, a machete and three Molotov cocktails. Robinson says Pierson shot Davis before killing himself. The librarian escaped the school unharmed.