“Criminal charges are rare”
Not in my state. The prison facilities I went into always had a poster displayed in the metal detector room that advertised “DONT BE ONE OF THESE”.
Below that we’re pictures of ex-prison employees (usually guards) and the crime that got them put into prison.
Usually introducing contraband into a facility but more than once I saw female guards that are incarcerated for exactly what this story describes.
Perhaps it is different in federal facilities.
I remember when our country was better...