Characters
I’ve been out of the abbey two days, I’ve beaten a lawman senseless, I’ve fallen in with criminals. I watched the captain shoot the man I swore to protect. And I’m not even sure if I think he was wrong.
— Book ‧ Firefly

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker lists a rapid slide into violence and bad company, culminating in watching a killing of someone they had vowed to protect. The unsettling twist is the admission that they cannot say the shooter was wrong. It captures a conscience shaken by discovering its own uncertainty.
Context reviewed