XO: Creepy-as-hell serial killer mini-comics

XO is a grimly effective mini-comic in which a serial killer recounts his various murders with a chilling casualness. Brian John Mitchell writes the stories, with Melissa Spence Gardner's plain, almost childlike drawings serving to make each tale even more creepy. Originally published as tiny comic books, you can see them below in Youtube form. The simple slideshow presentation and lack of music or sound effects actually works remarkably well for these stories.