Jonathan Lewis was attacked by about 15 teens for defending a smaller child outside his high school and died one week later

A grieving father in Nevada has paid tribute to his 17-year-old son’s “heart of a champion” and denounced the scourge of teenage violence after the boy was beaten to death by a mob outside his high school for defending a smaller child.

Jonathan Lewis said his son – also named Jonathan – died at the University medical center in Las Vegas last Tuesday, one week after the attack involving about 15 others near the city’s Rancho high school.