Count To Ten

Amy is cursed by her psychotic impulse to count every good or bad thing that happens in her life. When she reaches her decisive bad count of ten, there''s a real danger that her alter-ego, Jessica, will make someone suffer.
The local police force is in a state of flux. Detective Sergeants Holmes and Chappell are thrown together to solve a murder. One inspirational, one meticulous, they are presented with a body more than a week old, limited and contradictory forensic evidence, and no obvious suspect.
Having missed the critical first forty-eight hours of opportunity, the detectives have an uphill struggle if they are to solve a brutal and callous crime and achieve a successful arrest and conviction.
The perpetrator has methodically cleansed the crime scene and dispassionately disposed of the evidence. Can she continue to avoid detection? Could she possibly strike again?