"I had no choice!" Arthur roared, uncaring who heard. "Do you think, even for one second, I believed her to be a sorcerer?" He ran his fingers through his hair and whirled away from Merlin and the familiar guilt. Guinevere had been an innocent, and Arthur hadn't been given a choice in the matter. He hadn't been alone when he found the poultice under Tom's pillow.
And he certainly hadn't been the one to run Tom through later with a sword.
He helped a sodding Druid boy escape the city, for God's sake, he hadn't even known the boy for more than a few hours.