Rachel Walters was found dead at three in the afternoon laying on the floor of an abandoned five-story building, head bleeding and her dress ripped open. Forensics concluded that there must have been a struggle on the rooftop and the attackers must have thrown her off the roof afterwards.

She had not been raped.

They brought in three suspects to get their statements.

Jade North: I was in the neighboring building. I was speaking with a client- I am a therapist, you see- and then I heard a loud thump and my client shrieked. I ran down the stairs- I have never ever run down two flights so quickly and once I was outside, I saw the poor girl lying on the concrete floor, dead and surrounded by blood. I called 911 immediately. I only recognized her once the paramedics helped into the ambulance. My son dated her a while back. It's a horrible coincidence.

Cameron North, Jade's Son:  I was, actually, in a date. Yeah, Rachel was my ex and I needed to get over her. She called it quits, and I suffered from rage. It got awful. Then I met this lovely woman at an Alcoholics Anonymous meeting and I fell in love. I have just gotten over Rachel, and now she is dead. I can't believe it.

Kendall North, Jade's sister: I was at my sister's house when it happened. She was busy with a client, so I was in the kitchen making tea, while she worked with her patient in the office. The kettle is by the window, so, when I looked up, I saw this fight happening on the rooftop. I recognized the victim immediately. It was Cameron's ex-girlfriend, the one who caused him Sai much damage. The attacker was man. He was wearing a hoodie so that I couldn't make out his face. All of a sudden, after he ripped her dress, he threw her over the edge of the building, and she landed on the concrete. I heard Jade's client scream, so I quickly followed mg sister and met her on the streets. She called nine-one-one.

Who killed Rachel?