catching a serial killer

I am in the middle of an ice skating rink during Christmas time. There's a big tree on the side and festive lights surrounding me. There is a guy dressed up as Santa Claus. He is the serial killer I am looking for. The cops have hired me to use as bait for the serial killer.

I approach him and we talk for a little bit. He starts getting suspicious and starts to skate away from me. As I try to skate after him, the crowd engulfs him and for a split second I no longer know where he is. I turn around and he's next to me in a different outfit. We hold each others' hands and skate in a circle. He's trying to pull me away from the crowd but I keep him in the middle. We're turning in circles but staying in the same spot. He's talking to me in a very charming manner. I definitely know this is him.

The serial killer and I are standing still. Coming behind him, I see my sister, who's also a part of the undercover piece, and behind her are a bunch of uniformed cops. My sister finally comes up beside him and he knows what's happening. I turn him around and my sister and I start to cuff him. He struggles and tries to fight us off but the other cops are approaching.

And then... I wake up.