Oxford: 20 March, 7.36 p.m.
He cuts the fuel line to the girl's car while she enjoys an early dinner at her friend's house, and then watches the petrol spatter onto the tarmac and run down the hill away from the car, the residue evaporating slowly.
Minutes later he sees her emerge from the house and he follows the car for a quarter of a mile into the country, observing silently as she pulls the dying vehicle to the side of the road.
Flicking off the lights and turning his ignition key to 'off', he allows his own car to glide to a quiet halt fifty yards along the lane behind her. He listens as the girl tries in vain to fire up the parched engine.
He steps out of his car and walks slowly along the lane, keeping out of the moonlight and staying in the tessellated shadows.
She is a mere silhouette, as the lemon lunar radiance spills across the car roof and lights up the branches of trees and the leaves overhead.
The plastic covers over his shoes squelch against the soft turf. He can hear his own steady breathing, which hits the inside of the plastic visor covering his face. He quickens his pace.
The girl stops turning her ignition key and looks around her through the windows, but she doesn't see him in the deep shadows as he walks towards her car.
He sees her pick up her mobile phone from somewhere on the passenger seat. Two more paces and he is at the door. Opening it, he thrusts inside, scalpel first.
The girl screams and her fingers loosen on the phone, letting it slide down her front and onto the floor of the car. In one seamless movement he leans in close and raises his arm. She cannot see his face, obscured as it is by perspex.
The girl starts shaking involuntarily, her mouth open, speechless with terror. As she is about to scream her attacker's free hand comes down hard over her mouth. His face is only a few inches away from hers now — she can see through the visor that his black pupils are huge.
Her pain starts as a pinprick, but in an instant it swells into her chest. In disbelief, she feels liquid spill out of her, soaking her blouse. The metal of the blade feels like it is rearing up inside her neck, pushing on to pierce her brain.
She shudders and a roar comes from her throat. It hits dead air and is swallowed up.
The next thing that flies from her mouth is a stream of blood. Arterial spray flies over the front seat and hits the windscreen.
Seconds later she is dead.