矢 - arrow (for shooting, as opposed to drawn ones)

Note that you can sort of combine tags in the search box, just separate them with a space: "矢 射殺" gives you arrow AND shot dead -- currently 3 very relevant images.

Sort of because it does a partial match on each, so 矢 will match any tag that contains the character -- lots of names do, for instance. But in this case 射殺 is nicely specific and only combines with 矢 when it means an actual arrow for killing girls with.

Also remember to select exact match again when you need it!