Abraham's own bargain for Sodom - the identical 'find' verb, now searching Jerusalem's streets instead.
“Run back and forth through the streets of Jerusalem, and see now, and know, and seek in its wide places, if you can find a man, if there is anyone who does justly, who seeks truth, then I will pardon her.
Yahweh said, “If I find in Sodom fifty righteous within the city, then I will spare the whole place for their sake.”
Opening the chapter with a literal search through Jerusalem's streets stages the indictment as an investigation, not just an accusation - inviting the reader to look too.