'She went on making sounds in her throat, her eyes rolling frantically. Breathing heavily, he held her down...She freed a hand and pounded at him, but her didn't feel her blows; then she scratched his face and he released her mouth for a moment. Sandra screamed very loudly, and went on screaming. He had to stop the noise.'

It has been the result of a chance encounter, Gary had never intended to kill the girl. But as his initial panic subsided he realised that there had been a witness, someone whose death he would now have to plan - in a premeditated, cold-blooded way . . .