Which theorist would be most likely to conceptualize the violence that occurred in Ferguson, MO after a grand jury decided not to bring charges against a white police officer in the killing of a black teenager as resulting from long-standing frustration over inequities?

Neal Miller

Explanation:

Neal Miller was a famous experimental psychologist of America. He is mostly associated with his famous frustration-aggression hypothesis.

According to him, the frustration-aggression hypothesis, in its strongest form, is the existence of aggression nature and behavior of a person that implies the occurrence of frustration and the very occurrence of frustration leads to aggression.

Thus the violence that took place in Ferguson relates to the theory provided by psychologist, Neal Miller.

Therefore the answer is - - Neal Miller