Damn straight, his 'leading' is what gave me ideas for how he would be. I have to write more deeply sinister villains, so this should be good practice in being thorough with the actions of said villains, even if this character is far from evil in his own right. Guess when I say went Dexter, I mean he only kills people who truly deserve such a penalty, not necessarily that he has a love to kill for the sake of it. However, psychosis and psychopathy will be deeply explored via those the character might end up being sent after or those who he is hired by.
To summarize, he grew up in British slums going to a pretty shitty school, lost both of his parents (father was a heavy drug user who tried to kill his wife when she didn't give him money to get more, charging her with a knife, and she promptly killed him instead), got adopted by a family in Britain before they moved to the US, got into proper psychiatry and started High School a year late, making quite a good setup working from home (working on what exactly does), but also works aside as a faceless, voiceless "Boondock Saint" of sorts.
I once had a story that focused on getting characters out of a gang, now I have one focused on eliminating them in the most literal way possible.