User blog comment:Nightslayer2/Who Is The Copy Cat Archer?/@comment-27700324-20180906005303

The main villains are the Longbow Hunters so i don't think it is them since they work with Diaz.

I believe it is Arthur Hallsey. For those who don't know, he is a copy cat Green Arrow who tried to kill those Oliver was just putting in jail. Believing Oliver was more effective in his early years. This guy was introduced in the Arrow novel, Arrow - Fatal Legacies. He was then killed in the book, but in an explosion where we didn't find out what happened to the body.