Question: What country was Gilles Tetreault's intended murderer from?

Context paragraphs:
Intabulation: Intabulation, from the Italian word "intavolatura", refers to an arrangement of a vocal or ensemble piece for keyboard, lute, or other plucked string instrument, written in tablature.  It was a common practice in 14th–16th century keyboard and lute music.  A direct effect of intabulation was one of the early advantages of keyboards, the ability to render multiple instruments' music on one instrument.  The earliest intabulation is from the mid-14th century Robertsbridge Codex, also one of the first sources of keyboard music still in existence.  Some other early sources of intabulated music are the Faenza and Reina manuscripts (from the 14th century) and the Buxheim manuscript (from the 15th century).  The Faenza manuscript,the largest of these early manuscripts, written circa 1400, contains pieces written or transcribed in the 14th century, such as those by Francesco Landini and Guillaume de Machaut.  More than half of its pieces are intabulations.  The large Buxheim manuscript is dominated by intabulations, mainly of prominent composers of the time, including John Dunstaple, Gilles Binchois, Walter Frye, and Guillaume Dufay.  The term "intabulation" continued to be popular through the 16th century, but fell out of use in the early 17th century, though the practice continued.  The exception is the 16th- and 17th-century Italian keyboard pieces which included both vocal and instrumental music.  Intabulations contain all the vocal lines of a polyphonic piece, for the most part, although they are sometimes combined or redistributed in order to work better on the instrument the intabulation is intended for, and idiomatic ornaments are sometimes added.

Gilles Tetreault: Gilles Tetreault is the original intended target of convicted murderer, Mark Twitchell.

Gilles Frozen Custard: Gilles Frozen Custard is a brand of frozen custard that originated at the Gilles Frozen Custard Stand, the oldest frozen custard stand in Milwaukee, Wisconsin (and one of the first in the country), dating back to 1938.  The company and custard stand (still at its original location) was founded by Paul Gilles.

Mark Twitchell: Mark Andrew Twitchell (born July 4, 1979) is a Canadian convicted of first degree murder in 2011 for killing John Brian "Johnny" Altinger.  His trial attracted substantial media attention because he was inspired by the Dexter Morgan character, featured in Jeff Lindsay novels and the "Dexter" television series, a serial killer who works as a forensic bloodstain pattern analyst for the fictional Miami Metro Police Department.

The One Who Got Away: The One Who Got Away: Escape from the Kill Room (CreateSpace Independent Publishing Platform, ISBN  ) is a non-fiction book by first time author Gilles Tetreault.  The book is a true crime novel based on true events.

Gilles Garnier: Gilles Garnier (died 18 January 1573) was a French hermit and cannibalistic, serial murderer convicted of being a werewolf.  Alternately known as "The Hermit of St. Bonnot" and "The Werewolf of Dole".

Chronological Classics complete discography: Chronological Classics was a French compact disc reissue label.  The original owner Gilles Pétard intended to release the complete master takes of all jazz and swing artists that were issued on 78 rpm records.  By the time the label suspended operations in July 2008, its scope had extended into the LP era.

Alain Gilles Trophy: The Alain Gilles Trophy is an annual award that is given to the best active French basketball player in a given season, regardless of the country they play in.  The award is named after Alain Gilles, who played 159 games for the French national basketball team.  Voters for the winner of the award include FFBB members, national team veterans and French media representatives.

Maxwell the Magic Cat: Maxwell the Magic Cat was a comic strip written and drawn by Alan Moore under the pseudonym 'Jill de Ray' (in parody of Gilles de Rais, a French murderer).

Eglinton West line: The Eglinton West line was a proposed east–west subway line in Toronto, Ontario, Canada along Eglinton Avenue West.  It was to start from the existing Eglinton West Station on the Toronto Transit Commission's Yonge–University–Spadina line and terminate at Black Creek Drive in its initial phase.  City of York Mayor Fergy Brown, Metro Toronto Chairman Alan Tonks, Ontario Premier Bob Rae, Ontario Minister of Transportation Gilles Pouliot, and TTC Chair Mike Colle broke ground on the project in a ceremony on 25 August 1994 at Eglinton Avenue and Black Creek Drive; however, work was halted in 1995 when the newly elected Government of Ontario under Mike Harris cancelled the project.  The excavation under Eglinton West intended to be Allen Station was subsequently filled in.

Supporting paragraphs: Gilles Tetreault Mark Twitchell
Answer: Canadian