Finding A Person's Transparent Skin Shed In One Snake-Like Piece

[ER]

I got asked today what TV show or movie it was, sci-fi, obviously, where a search party found a human size and human shaped opaque shed skin all in one piece, and lifted it up off the ground, and I said I don't know if I ever saw that. She said maybe it was one of the Star Treks, but she wasn't sure. Anyone know what this might've been?

[Alex]

Could be Supernatural, or maybe The X-Files?