Question: Who worked for Scarface and is a suspect in the St. Valentine's Day Massacre? 

Context paragraphs:
Jun Fujita: Jun Fujita (フジタ・ジュン , Fujita Jun , 13 December 1888 - 12 July 1963) was an Issei photojournalist, photographer, silent film actor, and published poet in the United States.  He was the first Japanese-American photojournalist.  As an American, Fujita lived in Chicago, Illinois and worked for the now defunct newspapers: the "Chicago Evening Post", published from 1886 to 1932, and "Chicago Daily News", which was published 1876 to 1978.  Fujita was the only photographer to document the aftermath of the St. Valentine's Day massacre.  Following his death in 1963, most of his work was donated to the Chicago Historical Society, which later became the Chicago History Museum.

St. Valentine's Day Massacre: In Your House: St. Valentine's Day Massacre: In Your House was the 27th In Your House pay-per-view from the World Wrestling Federation (WWF).  It took place on February 14, 1999, at The Pyramid in Memphis, Tennessee.  The title of the event alludes to the Saint Valentine's Day massacre of 1929, which saw seven people murdered as part of the gang war between Al Capone and Bugs Moran.  The event saw the WWF debut of Big Show, who was referred to by his real name, Paul Wight, during the event.

Harry Keywell: Harry Keywell, (December 8, 1910 – August 30, 1997), was a convicted member of Detroit's infamous Purple Gang, which terrorized Detroit during Prohibition.  Chicago Police questioned him about the infamous St. Valentine's Day Massacre in February 1929, on the suspicion that Keywell acted as a lookout for the killers, however Harry had a cast-iron alibi for the day.

Peter von Frantzius: Peter von Frantzius (sometimes Frantizius) (died April 6, 1968) was a Chicago businessman and arms dealer to the Chicago underworld during Prohibition, later dubbed by the press as ""The Armorer of Gangland"".  An almost exclusive supplier of the Chicago Outfit (although often selling to rival gangs such as the North Side Mob), he was one of the first to supply "Tommy" submachine guns and other specialized weaponry connected to countless gangland slayings during the bootleg wars of the 1920s, including the murder of Brooklyn mobster Frankie Yale in 1928, the St. Valentine's Day Massacre in 1929 and the 1930 gangland murder of Chicago journalist Jake Lingle.

Fred Burke: Fred "Killer" Burke (May 29, 1893 – July 10, 1940) was a Midwestern armed robber and contract killer responsible for many crimes during the Prohibition era.  He is considered a prime suspect in the infamous St. Valentine's Day Massacre of 1929.

Al Capone: Alphonse Gabriel Capone ( ; ] ; January 17, 1899 – January 25, 1947), sometimes known by the nickname Scarface, was an American mobster, crime boss and businessman who attained fame during the Prohibition era as the co-founder and boss of the Chicago Outfit.  His seven-year reign as crime boss ended when he was 33 years old.

Robert Carey (gangster): Robert "Bob" Carey (August 25, 1894 – July 30, 1932) was a Midwestern armed robber and contract killer responsible for many crimes during the Prohibition era.  He is considered a suspect in the infamous St. Valentine's Day Massacre of 1929.

Frank Rio: Franklin Rio also known as "Frank Rio" and "Frank Cline" (June 30, 1895 - February 23, 1935) was a member of Al Capone's Chicago-based criminal organization known as the Chicago Outfit.  He was also an alleged gunman in the famous 1929 St. Valentine's Day Massacre.

James McLain: James "Revolvers" McLain (1903 – September 23, 1934) was a member of Jack McGurn's crew, in the Chicago Outfit, and believed to be involved in the 1929 St. Valentine's Day Massacre.

Gus Winkler: Gus Winkler (March 28, 1901 – October 9, 1933) was an American gangster who headed a Prohibition-era criminal gang specializing in armed robbery and murder for hire with Fred "Killer" Burke.  Winkler was an associate of Chicago mob boss Al Capone and is considered a suspect in the St. Valentine's Day Massacre.

Supporting paragraphs: Gus Winkler Al Capone
Answer: Gus Winkler