Dr. Roy Guerrero, a local pediatrician in Uvalde, Texas, was called in to treat the dying and wounded students of the recent school shooting. He testified before Congress on the horrors he saw in the emergency room. During his testimony for the House Committee on Oversight and Reform, he recalled the scene that unfolded outside the hospital as he arrived. Guerrero painted a picture of chaos for the audience as he described the hours that followed. As he arrived at the hospital, several parents had already formed outside asking for information on their children. “Those mothers’ cries, I will ne…