Who is Dan Cody in The Great Gatsby?

He is a man of 50 who Gatsby met at the age of 17, while clam-digging and salmon-fishing. He owned a yacht and that's when Jay Gatz changed his named to Jay Gatsby. Dan Cody was an alcoholic and took Gatsby under his wing for five years, teaching him illegal bootlegging before his death. He left Gatsby $25,000