gondnok Anglais:

There was only one warden on duty when the riot started.

a traffic warden

A prisoner is more obsessed with the idea of escaping than his warden by the idea of watching over him. Thus, a prisoner will always manage to escape.

It surprises most people to find out that the prison warden is a woman.

What about the janitor dealing drugs at school?

Being a janitor is a good job