Wrong Side of the Tracks - Season 4 Episode 5 -

Now that Tirso knows that Romero has returned to the neighborhood and that he is the gang murderer, he will not give up in his efforts to find him and finish him off. What he does not expect is that Ezequiel will discover that Tirso was there when Quini and his henchman were murdered. The policeman immediately suspects that the hardware store may be the murderer of gang members and begins to investigate him with the help of Camila.