Justice or Reveng?

A perfect family. Nilton, an exemplary family father, worker, and companion. Vanda, mother of the beautiful Aline, a cheerful woman and extremely dedicated to the family. Mrs. Soraia, Nilton's mother, adored her daughter-in-law and granddaughter. Saturday night Guto, Flavia, Rick and Regis, young people from the upper middle class, had drunk heavily, yet they went to the beer hall downtown, bought two more bottles of liquor and drove out with their car at high speed through the city.
After they entered the quiet street where Aline was playing hopscotch, Guto got distracted and went all out for the family. A real tragedy in the small town of Alvora B. Lopes. Despite seeing the gravity of the situation, Guto did not render aid and left with the car fleeing to another city. Unfortunately, justice was not done, the boys were acquitted, much to the revolt of Nilton, who began to do his own justice.
How far can we judge a man of taking justice into his own hands? And when does that justice turn to revenge? Should Nilton be judged for his actions outside the standards of our laws? It's up to you to draw your conclusions.