What does 2 Chronicles 24:22 mean?

King Joash didn't remember the kindness Zechariah's father had shown him, and killed his son. As Zechariah was dying, he said, 'May the Lord see this and bring justice.' 2 Chronicles 24:22 - Modern Text Bible

(Joash betrayed the family that had saved him, and Zechariah's last words were a call for God to hold them accountable.)