Who is Aurelio Escovar from Collected Stories and what is their importance?

Aurelio Escovar

Aurelio Escovar is the meticulous dentist in "One of These Days" who is pressed into service extracting an infected wisdom tooth for the corrupt mayor, whom he hates. When he is told the mayor will kill him unless Escovar sees him, he lets the politician into his clinic while reaching for a revolver—that he does not need. When he yanks the mayor's rotten tooth out without benefit of anesthesia, he tells the mayor his pain is in retribution for causing the deaths of 20 local young men, presumably political opponents.