Lexington paper reports FO was initially in an induced coma. He has emerged from the coma but is still unconscious and in critical condition. According to his mother, he wasn't originally scheduled to fly on Sunday. He arrived in Lexington early Saturday morning, Capt. arrived Saturday afternoon. Crew arrived at KLEX about 05:15 Sunday and fired up APU in what eventually turned out to be the wrong aircraft before boarding N431CA.
Lexington Herald-Leader
Additional from Louisville, Kentucky paper