During the inaugural, Texas stop of her Endless Summer tour, Lana Del Rey took things back with a performance of a rare, unreleased effort entitled “Serial Killer.” The song made the rounds on the internet a few years back, though received no official release of any sort. “Serial Killer” was recorded years ago and there were never even any hints about the song making it onto a project, but it looks like Lana Del Rey is still supporting the song. Maybe “Serial Killer” could turn into another, more fully-formed track in the future? You can check out Lana Del Rey’s performance of “Serial Killer” above. A couple weeks back, Lana took to Twitter to share a preview of a new song.