Killing Alyssa: A crime thriller suspense book

There have been more than three bodies found at the city, there was an unknown serial killer on the loose. When another body was found, Alyssa a Detective assigned to the case wondered if that was her sister as she had gone missing for days. She was broken when she found out that her sister had been murdered and the killer had left a note describing every detail of the act and how much he enjoyed it. Detective Alyssa and her team became more desperate in finding the killer. How far will she go to arrest this monster? Could the killer be one of the police officers? Watch out for suspense, romance, thriller, mystery, and danger.