Stanley Dover

"But I'm starting to think that you're not listening to me either, Oliver. I can tell! And you could've, you should've apologized to me for being mean to me at Slabside, but you haven't! So I'm starting to think that you're just like everybody else, and you don't deserve my, my protection."

- Stanley Dover threatening Oliver Queen

Stanley Dover is an inmate (Inmate 9922) of Slabside Maximum Security Prison who was incarcerated after committing murder. He was referred to by the media as the Star City Slayer, a nickname he despised.

Early life
Stanley was born into an abusive household regularly being given "medicine" by his father who would "correct him" when he was behaving badly or didn't listen.

His older brother tried to defend Stanley but only made matters worse for him.

The beginning of the Star City Slayer
Over time as Stanley's anger grew, he gave his parents some medicine and "corrected" them for revenge.

When Stanley's brother found out the truth, he tempted on sending him away to Arkham Asylum to be imprisoned, but was "corrected" by Stanley soon after as he "didn't have a choice".

This along with murders of 3 other victims' friends and families led Stanley to be incarcerated within Slabside Maximum Security Prison.

Imprisonment and escape
Stanley recognized Oliver Queen as the Green Arrow and attempted to gain his services for protection, but Oliver refused and told Stanley to leave him alone. The next day, following a fight where Oliver planted a shiv on Ben Turner, Stanley sat with Oliver at lunch, when Danny Brickwell and Derek Sampson showed up, still pushing for Oliver to join their three-man operation as a replacement for Turner. The two men beat up Stanley when Oliver continued to reject their offer, leaving Stanley at their mercy. Oliver soon apologized to Stanley as he was on the guard's radar and could not afford to have another strike to his name. Stanley, angered Oliver abandoned him, reminded Oliver that he also had a family and insulted him for being a coward. Stanley later watched in the prison yard as Oliver beat up Brick and one of Ricardo Diaz's goons, the "Grim Reaper", seeming to have taken Stanley's words into account. Stanley then started following Oliver everywhere and became his sidekick.

Later after Oliver returned from Level Two, Stanley murdered B. Dunbar, a guard, and framed Ben Turner by planting his shiv and letting Oliver find it. However, he was exposed by Oliver who refused to help him after he is freed. He then witnessed Oliver break out, and escaped from his cell when Ricardo Diaz released everyone. He then drugged and trapped Oliver to talk, but was beaten and knocked out by him easily. Knowing that the morgue is the only way out, Stanley went there, running into Danny Brickwell. He killed Brick for picking on him, then escaped from prison.

Return and being sent back to prison
Sometime later, Dover began to paralyze and then kill people with the help of a rare drug. After sending threatening notes to several people, he was tracked down by Curtis Holt and Dinah Drake, managing to escape by cutting the latter's throat non-fatally. He then proceeded to Oliver Queen's house and paralyzed his entire family, insanely shouting about how everyone had been so "mean" to him, and that he had to kill everyone. He was distracted mid-conversation and knocked out by Oliver, as the SCPD arrived and took him into custody.

Dover is later send back to Slabside Maximum Security Prison, it is very likely that security will be tightened; to make sure he doesn't escape again or harm any of the staff or other inmates.

Personality
Even before Stanley's incarceration, he was already a sociopath to begin with, evidenced by the fact that he killed his parents due to how they abuse them, and then later killed his brother, when the latter attempted to send him to Arkham Asylum to be imprisoned, then began to kill several civilians (innocent or guilty) which eventually led to him being imprisoned in Slabside Maximum Security Prison.

As an inmate, Stanley is someone with survival as a priority, relying on Oliver Queen as his one chance to stay alive in prison. He is also afraid of powerful criminals like Ricardo Diaz. He even lied to Oliver that he was wrongfully accused of murder, but he actually is a serial killer. However, he doesn’t like being picked on, killing Danny Brickwell out of revenge for his past treatment of him.

Despite using him for his own ends, Stanley is still a big fan of Oliver, often admiring his past actions as the Green Arrow, even saying his iconic quotes like "You have failed this city" and giving him nicknames like "G.A.".

However, Stanley's admiration was revealed to be more of an outright obsession with Oliver's past tactics of killing others as the Hood.

Stanley's time in prison clearly did not reform him, as evidenced by the fact that he killed B. Dunbar and then frame Ben Turner for no apparent reason.

Stanley's number one goal in Star City is to make sure that he "corrects" those who he deems to be a threat to Oliver Queen's life, even to Felicity and William, by killing them. However, for those who call him by the name "Star City Slayer", he would threaten to kill them anyway.

Behind the scenes

 * In the main DC comics continuity, Stanley Dover is an amateur occultist who hunted and murdered young children, murdering them to use their blood as a means to attract a demonic entity, coming to be known as the "Star City Slayer". He crossed paths with Oliver Queen, whose body he had hoped to take over in order to further his cause.