Joyner

Lieutenant Joyner is the leader of Shadowspire and a Army Lieutenant who formerly served in Afghanistan.

Time in Afghanistan
In 2005, Joyner served as a Lieutenant stationed in Afghanistan along with two privates, Andy and John Diggle. Realizing that the two brothers deserved to move on to better things, Joyner tempted them with the offer of confiscating opium from Afghanistan to earn money. Andy, putting on a front for his older brother, stuck to his morals and shot down the offer but was later caught by John shaking hands with Joyner and passed it off as simply teaching him a blackjack card counting technique. Joyner also traded the stolen opium to his boss, Baron Reiter, in exchange for Slam found on Lian Yu. At some point, Joyner formed Shadowspire and the group was taken down by A.R.G.U.S. in 2013 in an OP run by Alan Chang.

Payback on A.R.G.U.S.
While walking home from a date, John and his wife Lyla Michaels witness Chang being shot in the back and abducted by Shadowspire who mutilate him by removing an eye, pulling off his fingernails and lacerating him. Two other agents that were abducted are later found dead by Team Arrow. Andy, knowing how Joyner and Shadowspire operates, reveals to Amanda Waller, Diggle and Lyla that Joyner and Shadowspire are using the Railgun stealings as a diversion for their endgame. Using Chang's eye, Joyner and Shadowspire infiltrate the A.R.G.U.S. headquarters and demand Rubicon access codes from Waller, who admits that she won't break even if everyone in the room is killed. Realizing that this is case when Lyla admits that Waller doesn't make decisions based on human life, Joyner shoots Waller in the head and uses Lyla for the codes. The Diggle brothers manage to work together in order to stop Shadowspire long enough for Team Arrow to arrive and Andy saves John from being shot by Joyner, who he manages to beat in a fist-fight.