Question: When was the  American murderer and body snatcher died based on who's anme Bradley Mark got a stage name?

Context paragraphs:
The Body Snatcher: The Body Snatcher is a short story by the Scottish author Robert Louis Stevenson (1850–1894).  First published in the "Pall Mall Christmas "Extra"" in December 1884, its characters were based on criminals in the employ of real-life surgeon Robert Knox (1791–1862) around the time of the notorious Burke and Hare murders (1828).

Ed Gein: Edward Theodore Gein ( ; August 27, 1906 – July 26, 1984), also known as The Butcher of Plainfield, was an American murderer and body snatcher.  His crimes, committed around his hometown of Plainfield, Wisconsin, gathered widespread notoriety after authorities discovered that Gein had exhumed corpses from local graveyards and fashioned trophies and keepsakes from their bones and skin.  Gein confessed to killing two women – tavern owner Mary Hogan in 1954, and a Plainfield hardware store owner, Bernice Worden in 1957.  Gein was initially found unfit to stand trial and confined to a mental health facility.  In 1968, Gein was found guilty but legally insane of the murder of Worden, and was remanded to psychiatric institutions.  He died at Mendota Mental Health Institute of cancer-induced liver and respiratory failure at age 77 on July 26, 1984.  He is buried next to his family in the Plainfield Cemetery, in a now-unmarked grave.

Mark Walker (North Carolina politician): Bradley Mark Walker (born May 20, 1969) is an American politician and pastor from the state of North Carolina.  A Republican, Walker has represented North Carolina's 6th congressional district in the United States House of Representatives since 2014.  In 2017, Walker was elected to head the Republican Study Committee.  He is a pastor and Trump supporter.

Hannah Mary Tabbs: Hannah Mary Tabbs, born Hannah Ann Smith, was an American murderer in the late 1800s.  Born into slavery in the 1850s, she escapes northwards and settled in Philadelphia, where she was accused of murder after a body was found lacking both limbs and a head.

Gidget Gein: Bradley Mark "Brad" Stewart (September 11, 1969 – October 8, 2008), known by his stage name Gidget Gein, was an American musician and artist.  He was the second bassist and co-founder of the alternative metal band Marilyn Manson.  His stage name references and dichotomies serial killer Ed Gein and the fictional 1960s surfer girl Gidget.

Marvin Lee Wilson: Marvin Lee Wilson (January 5, 1958 – August 7, 2012) was an American murderer who was executed by the State of Texas on August 7, 2012.  He entered death row on May 9, 1994, for the murder of a police drug informant who had caught him dealing cocaine.  On November 10, 1992, Wilson abducted and shot 21-year-old Jerry Robert Williams following a physical confrontation between the two in the 1500 block of Verone in Beaumont.  Wilson then left the body of Williams at a bus stop where it was later found by a bus driver.  At the time of the murder, Wilson had two previous convictions for robbery, one of them aggravated.

Brad Emaus: Bradley Mark Emaus (born March 28, 1986) is a former American professional second baseman.  Emaus played for the New York Mets of Major League Baseball in 2011.

The Body Snatcher (film): The Body Snatcher is a 1945 horror film directed by Robert Wise based on the short story "The Body Snatcher" by Robert Louis Stevenson.  The film's producer Val Lewton helped adapt the story for the screen, writing under the pen name of "Carlos Keith".  The film was marketed with the tagline "The screen's last word in shock sensation!"  The frequent mentions of Burke, Hare, and Dr. Knox, all refer to the West Port murders in 1828.

Elmer Brunner: Elmer David Brunner (died April 3, 1959) was a convicted American murderer and was the last defendant executed by West Virginia.

Michael Wincott: Michael Anthony Claudio Wincott (born January 21, 1958) is a Canadian born film and television actor, well known for portraying villains and anti-heroes, such as Guy of Gisborne in "", Top Dollar in "The Crow", Conway Twill in "Dead Man" and Captain Frank Elgyn in "" and, the real life murderer and body snatcher, Ed Gein in "Hitchcock".

Supporting paragraphs: Gidget Gein Ed Gein
Answer: July 26, 1984