http://en.wikipedia.org/wiki/Keith_Matthew_Maupin

Keith Matthew "Matt" Maupin (born July 13, 1983, date of death unknown) was a United States Army Private First Class (PFC) captured by Iraqi insurgents on April 9, 2004 while serving in the Iraq War, after his convoy came under attack by rocket-propel grenades and small armsfire near Baghdad Iraq

On June 28, 2004, Arabic-language  television network Al Jazeera aired a low-quality video purportedly depicting Maupin's execution.

On April 16, 2004, Maupin appeared on a videotape that was broadcast by the Arabic-language television network Al Jazeera. The tape, reportedly delivered to the U.S. Embassy in Doha, Qatar, raised hopes that Maupin was still alive. In the video, the soldier identified himself as "Private First Class Keith Matthew Maupin", a standard procedure followed by prisoners of war that protects their rights under the Third Geneva Convention

On June 28, 2004, Al Jazeera reported that Maupin was executed by a group identifying itself as The Persistent Power Against the Enemies of God and the Prophet