Stuck on British Embassy level

[redscare]

Ummm, so there's a knife in the level and the poison has a use

***SPOILER***
I've just finished the level by walking into the third floor room where there's a diplomat, a secretary and a black-suit guard. Used chloroform on secretary, kill guard, chloroform diplomat. Move bodies into diplomat office. Wait for target and shoot in the head.

Took about 20 retries to get the correct timing to be able to hide all bodies before the door to the main corridor gets open when target enters.

I'll try again the mission and use the poison.