[NSFW] If you're a police officer or police detective, how would you handle this situation?

You are a police detective. There have been numerous reports of missing people in your precinct over the past few weeks. You and your partner go door-to-door in the neighborhood seeking a possible witness or perp. One house you go to, a noted physician, is highly defensive and agitated. He has a large cage as the centerpiece of his living room. His answers to your questions are inconsistent. Your years of experience scream at you that this is the perp. He refuses to let you search his home. You return an hour later with a search warrant. Nobody answers the door, so you break in. You and your partner split up to search the house. When you look in one of the rooms, you see a bizarre scene: Three naked people are on their hands and knees. One man is clearly dead with his throat cut and a pool of blood under his body. A woman behind him has her face his his ass and waves frantically at you. Another woman is in the rear with her face in the first woman’s ass, who also appears to be dead. As you start to approach, you hear gunshots elsewhere in the house. What do you do?