Question: What is the nationality of the person released the song "Have Mercy on the Criminal"?

Context articles: The Last Fight (Bullet for My Valentine song)
Mercy (Duffy song)
Hostage Taking Act
Elton John
Castle Walls
Say Yes (Tony Moran song)
Universal jurisdiction
Yeah Ya Know (Takers)
Angel of mercy (criminology)
Have Mercy on the Criminal

"The Last Fight" is a song by Welsh heavy metal band Bullet for My Valentine, released as the second and lead UK single from their third album, "Fever", on 19 April 2010 to the radio and a limited 7" edition of 1000 copies on 17 April 2010 with "Begging for Mercy" as a B-side.
 An acoustic version of the song was released as a "Pre-order Only" bonus track on the iTunes version of the album.
 Before all that, "Begging for Mercy" was offered for free download on 14 February 2010 from the band's official website for a limited time.
"Mercy" is a song performed by Welsh singer Duffy, released as the second single from her debut studio album, "Rockferry" (2008).
 Co-written by Duffy and Steve Booker and produced by Booker, it was released worldwide in 2008 to critical acclaim and unprecedented chart success.
 As Duffy's first international release, the song is credited with firmly establishing her career and is now considered her signature song.
 "Mercy" received comparisons to Duffy's previous single, "Rockferry".
 Critical reviewers of "Mercy" noted similarities between the song to releases by Aretha Franklin, Dusty Springfield and The Supremes, as well as contemporaries such as fellow British singer Amy Winehouse.
 "Mercy" peaked at number one on the UK Singles Chart in February 2008, remaining at the top of the chart for five weeks.
 The single also topped the charts in Austria, Germany, Greece, the Netherlands, Norway, Republic of Ireland, Switzerland and Turkey, and peaked within the top five of the charts in Belgium, Denmark, France, Italy, Japan, New Zealand, Romania, Spain and Sweden.
The United States makes hostage-taking a criminal offense pursuant to  /1203 § 1203  .
 Generally, the Act applies to conduct occurring within the territory of the United States.
 However, under Subsection B, an offender may be indicted under the Act even if the hostage-taking occurred outside the territory of the United States if the "offender or the person seized or detained is a national of the United States; the offender is found in the United States; or the governmental organization sought to be compelled is the Government of the United Stages."
 These provisions are consistent with the fundamental principles of international criminal law, specifically active nationality principle, universal principle, and the effects principle, respectively.
Sir Elton Hercules John, (born Reginald Kenneth Dwight; 25 March 1947), is an English singer, pianist, and composer.
 He has worked with lyricist Bernie Taupin as his songwriting partner since 1967; they have collaborated on more than 30 albums to date.
 In his five-decade career Elton John has sold more than 300million records, making him one of the best-selling music artists in the world.
 He has more than fifty Top 40 hits, including seven consecutive No. 1 US albums, 58 "Billboard" Top 40 singles, 27 Top 10, four No. 2 and nine No. 1.
 For 31 consecutive years (1970–2000) he had at least one song in the "Billboard" Hot 100.
 His tribute single, re-penned in dedication to the late Princess Diana, "Candle in the Wind 1997" sold over 33million copies worldwide and is the best-selling single in the history of the UK and US singles charts.
 He has also composed music, produced records, and has occasionally acted in films.
 John owned Watford Football Club from 1976 to 1987, and 1997 to 2002.
 He is an honorary Life President of the club, and in 2014 had a stand named after him at the club's home stadium.
"Castle Walls" is a song by American singers T.I. and Christina Aguilera, from T.I.'s seventh studio album "No Mercy" (2010).
 Alex da Kid produced the song and co-wrote it along with Skylar Grey and T.I.
 The song was initially produced for Diddy's album "Last Train to Paris", but Diddy felt that "Castle Walls" would be better suited to T.I.; Aguilera was later chosen as the featured artist on the song.
 A hip hop and electro number, "Castle Walls" received mixed response from music critics, some of whom picked it as a highlight from "No Mercy", and some others criticized the song's lyrics.
 Despite not being released as a single, the track still managed to appear on record charts of several nations, including on the US Bubbling Under Hot 100 Singles, where it peaked at number five.
"Say Yes" is a song recorded by Tony Moran featuring American vocalist Jason Walker and released as a single in 2016, produced by Moran and co-written with Walker and Mike Greenly.
 The song's theme centers around marriage equality and expressing a declaration towards marrying a person regardless of their sex, color, nationality, or religion.
 The single marks Moran's fifth number one, as well as Walker's fourth, on "Billboard"'s Dance Club Songs chart, reaching the summit in its December 17, 2016 issue.
Universal jurisdiction allows states or international organizations to claim criminal jurisdiction over an accused person regardless of where the alleged crime was committed, and regardless of the accused's nationality, country of residence, or any other relation with the prosecuting entity.
 Crimes prosecuted under universal jurisdiction are considered crimes against all, too serious to tolerate jurisdictional arbitrage.
Yeah Ya Know (Takers) is a song by American hip hop recording artist T.I., released on June 1, 2010 as the second single from his seventh studio album "No Mercy" (2010).
 It was also featured on the official soundtrack for the crime-thriller film "Takers", and can be found on T.I.'s mixtape "Fuck a Mixtape" (2010), as well.
 The song was released on May 24, 2010.
 The track is included on "No Mercy", as an iTunes and Amazon MP3 deluxe edition bonus track.
An angel of mercy or angel of death is a rare type of criminal offender (often a type of serial killer) who is usually employed as a caregiver and intentionally harms or kills people under their care.
 The angel of mercy is often in a position of power and may decide the victim would be better off if they no longer suffered from whatever severe illness is plaguing them.
 This person then uses their knowledge to kill the victim.
 In some cases, as time goes on, this behavior escalates to encapsulate the healthy and the easily treated.
"Have Mercy on the Criminal" is a song by Elton John released on his 1973 album, "Don't Shoot Me I'm Only the Piano Player".
 It is the most frequent live-track on the album besides the two dominating singles, "Daniel" and "Crocodile Rock".