[Ellie's P.O.V.]
Anton zoomed in on the image of the man and woman. Their faces were blurry but he still turned around and asked the principal, "Come take a look. Are these two teachers from the school? You'd better think carefully before you speak."
If the principal said yes, it would mean that there were teachers among the pack's school faculty colluding with Ferocious Tiger Gang. They would be arrested and the principal would be punished for oversight. If the principal said no, that they were of unknown origin who had infiltrated the school and caused the children to go missing, he might lose his position as the principal too.
The city's laws were strict and the management of the school was even more meticulous. Moreover, this was a school that had not had any significant events in hundreds of years.