I am kind of pissed off, because my mother was walking along a school alleyway with my little brother after playing tennis (both were enjoying some time off), and she stepped on a nail. Went in pretty good, she had incision w/o helpful anesthetic. How do I complain to the school? Who to complain? Principal? She wants to sue if an infection comes about...
It's a high school and all of my family are in the medical field

No, their property, their walkway.