Paul Warner Powell (April 13, 1978 – March 18, 2010) was an American man convicted and executed for the murder and attempted rape of a 16-year-old acquaintance in 1999. He also raped and severely injured the girl's 14-year-old sister, who unexpectedly survived. After his capital murder conviction was vacated on appeal, he wrote letters boasting about his crimes under the mistaken belief that he was exempt from punishment by the principle of double jeopardy. His letters were used as evidence against him in a second trial that resulted in his execution in 2010.