The daughter of the United passenger dragged off a plane over the weekend told reporters her father is a loving grandfather who did not deserve the mistreatment that left him with a concussion and horrific facial injuries. 

Crystal Dao Pepper, daughter of Dr. David Dao, spoke Thursday at a press conference in Chicago, where her father remains hospitalized. 

"We were horrified and shocked and sickened to learn what had happened to him and to see what had happened to him," she said.