Believing that the Green Arrow had murdered his father — which is an Arrow plot we’ve seen before — he sought revenge on Green Arrow.
When Richard Dragon tried to teach the value of compassion, Ricardo murdered him and took the Richard Dragon name for himself.
Ricardo Diaz is a significant villain for the Green Arrow in the New 52 era of DC Comics.
After the death of his drug lord father, Ricardo traveled the world and trained under a man known as Richard Dragon to transform his body into a weapon.