In a video he made with his PlayStation, a 12-year-old developmentally disabled boy in a group home points to his swollen right eye and says, “Mom, this is what it looks like. … He slammed me.”

His camera keeps rolling as his adult caretakers enter his room, where they can be heard but not seen on the video. One calls the boy “stupid ass,” and another warns: “I’m gonna kill a kid and you might be the one I kill. … You want me to f—— hurt you, boy?”