Been replaying in my head over and over. It was very unbelievable. It happened on thanksgiving. Two teenagers missing. I buried my head and i started to cry. Where they were and what they did would launch a terrifying case. Why did this happen here . With a deadly end. Nobody is leaving until we figure out what happened. A man at home alone and afraid. What what you felt a you felt in danger . You have a right to protect your home and yourself. He planned. He was prepared and he was determined to kill. The most chilling detail, what you will hear on tape. I am still shaking. Hello and welcome to dateline. Growing up Cousins Nick Brady and Haile Kifer were close. Nick love to choke and she loved to laugh. They were together that cold November Day when tragedy struck. The horrible incident was there for police to hear on a perfectly clear recording. Why was what happened so unclear . A mystery that would divide a community and spark a national debate. Here is Kate Snow with 12 minutes on