Do you know this CSI New York episode?

My friend told me about a creepy episode of csi ny and i'm trying to find out what the name of it is! It was about a man that walks on his hands and feet and wears a black suit with just a zip for his mouth and eye holes. In the woman that he murdered's house, in the attic there was a drawer with orange peels and under her bed was the shape of a persons body. Does anyone know what episode this might be??? Please and Thank you!!!! :D