Riley Howell, here in an undated photo, was killed after he tackled a gunman shooting people in a classroom at the University of North Carolina’s Charlotte campus. Police say Howell’s actions likely saved the lives of other students.

Riley Howell, here in an undated photo, was killed after he tackled a gunman shooting people in a classroom at the University of North Carolina’s Charlotte campus. Police say Howell’s actions likely saved the lives of other students.