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[ He takes a deep breath in attempt to stop himself from blurting it too fast. Though he can't stop his tongue, he learned that can at least brake it by doing something. It still won't stop him from saying it after, but it'll give him some time. Will it surprise Jon? It probably will. He believed Mondo to have a good heart, to be a hero, after all. Eyeing the sharp knife on Jon's hand, Mondo gestures for the boy to put it down. That'll be dangerous to hold. ]

I... [ He gulps, cold sweats permeating his palms. Immediately, he puts the car and the brush aside. ] I killed people before. My classmate. ...And my brother.