DWP - the white-haired woman: four-line prose prompt

On the pew in front of him, Kalan notices that the white-haired woman has been sitting still throughout the service.

At the end of the service, he is about to tap her shoulder to find out if she is alright when the white-haired woman stands up, walks across the aisle onto the altar proper, proceeds to the vestry and disappears inside.

Kalan thinks this as quite odd, and light on his feet, he sprints towards the vestry, curious to see what the woman looks like, but as he approaches he hears the muffled sound of a gun and a loud thud, the sound of a body falling on the floor, sounds all too familiar to a professional assassin that he is. He pulls his gun from the holster inside his suit, slams his body against the door which opens easily, and finds Father Richard on the floor, a bullet between his eyes, and the old white-haired woman standing a few feet away holding a revolver now aimed at him.