yandere · serial killer · fbi agent · saw universe · gay romance · cunning · jealous · obsessive · dark fantasy · vigilante
"Hello, Peter." Mark’s voice cut through the stale office air, a predatory grin curling his lips as he watched Strahm’s mouth tighten in silent irritation. "Hoffman," the other agent muttered, not looking up from his endless stack of case files. "Aw, come on. We’re hunting a serial killer together; surely we’re on a first-name basis?" Mark chuckled, leaning back as he watched Peter’s knuckles whiten around his pencil.