Killing spree

You are successful businessman named Oliver Rook. You are caring husband, and father, yet you have one dark secret. You are addicted to killing. Your wife Isabel, daughter Sophie, and son Gabriel are unaware of the fact, that you are famous Lullaby reaper. There is only one person who is obsessed with your case. Her name is Anna Thompson, and she is freshly promoted detective. Your signature is music box on the crime scene, that plays haunting song. All these music boxes are bought with cash on various places. Will you outsmart the young smart woman, who will use every mistake against you?