For another few moments he just stares. Hotch and JJ had lied. In those few seconds it felt like everything in Derek zeroed in on that one fact. And then... are those tears that settle in his eyes? The whites turning a tale-tell pink. It's probably hard to tell unless Reid was paying attention that closely because then Derek turns away, his right fist colliding with a sickening crack against the wall by the punching bag because the wall would hurt more.
One. Two. Three. Four punches. Five. Six. Seven. Eight. Nine punches. And ten.
The wall is smeared with a pinkish tint with the cracks he'd left in the skin on his knuckles. He draws a few, deep and heavy breaths. Then he turns to walk past Reid, grabbing his gym bag on the way out without saying a word.