The second status condition on Louis, indicating he has been physically restrained by someone.
Alongside Paralyzed, the officer status screen shows Louis as Bound. Carl curses when he sees it — a full health bar with both conditions means Louis isn't hiding anymore, he's been taken and tied down somewhere inside The Reaver Castle.
It's this pair of notifications that sends Samantha hunting through the castle's tiny hallways for him.
Confirmation that Louis is a prisoner, not a casualty.