Twenty-year-old Jack Young was taken by helicopter to University Hospital following the collision.
Investigators are still looking into the cause of the wreck. A witness told authorities that Young said he was texting. No charges have been filed.
Thirteen adult seniors on the bus were killed and another remains hospitalized. They were returning to First Baptist Church New Braunfels, following a three-day retreat near Leakey.
Meanwhile, funerals for some of the church members are taking place this week.