This is the fourth and final episode of “The Rules Are Different Here,” a four-part series on mass incarceration in New Hampshire. Listen to the full series here. Annie Wrenn is middle-aged with blond hair she wears with bangs. She’s a little over 5 feet tall. And on first sight, you’d never guess she’s a prison guard. “One of our nicknames is floorwalker because that’s what we do we walk the floors of the prison. Cell to cell, unit to unit, tier to tier, however you wanna explain what the