Poison dart from across the square into the guard next to the target, let his buddy take him out as he flails about.
Alternatively, send him a pizza, compliments of either his command station or a "free pizza for guardsmen andtargets officials" campaign. Then, as he's eating, watch as he discovers that it has pork sausage on it, despite his adamantly following the rules of eating only kosher, then continuously remind him of it, guilting him into his own suicide!
...Then eat the rest of the pizza, because, hey, free pizza.
Alternatively, send him a pizza, compliments of either his command station or a "free pizza for guardsmen and
...Then eat the rest of the pizza, because, hey, free pizza.