The Hidden Blade Assassin's Creed in Depth

http://www.youtube.com/watch?v=_AJCqb2-7uk

Unfortunately i kinda stuffed up at the part where i take out the 4 guards at the entrances, got an alert for a split second

It seems if you are sighted by the target for a split second, he wont alert anyone but run off to a new spot, so i used this spot to kill him in a more stylish way