The keyboardist is still alive and is 97 years old now.
According to the Wikipedia:
Dr. Robert McClelland, who treated Oswald at Parkland Hospital, has said that while at Parkland, he noticed that [now 97-year-old Jim] Leavelle was waiting outside the hospital room and said that Leavelle told him that after Oswald was shot, he claimed to have "leaned over Oswald and said, 'Son, you're hurt real bad. Do you wanna say anything?' He looked at me for a second. He waited like he was thinking. Then he shook his head back and forth just as wide as he could. Then he closed his eyes."[11]