You've sneaked into a high ranking official's office. You're employer has stated to implicate the official's political opponent. BUT they are both here in the same room. You have poison in your pocket, as well as a thread, your weapons(shuriken,katana,throwing knives,etc.), and night-vision goggles. The office is smaller than expected with only enough room for the desk between the two occupants, their tea and several square feet of open space. You're in the vent, and you know you must use the poison to kill the official while planting the vial it's in without either noticing AND retrieving all evidence of your operation(No knife left behind).
How do you do finish this operation?
How do you do finish this operation?