[Sighs and takes a breath before turning completely to face him.] Jamie Moriarty is a criminal mastermind from my world. She is awaiting trial for multiple counts of murder in the first degree among other notable felonies.
[He goes very quiet for a moment.]
....She came into my life under the guise of Irene Adler. I'll spare you the unnecessary details of what happened from there, only that she lied to me in an effort to secure her activities in London. Went as far as to fake her own death, causing my inevitable decent into- [He stops himself, clenching his fists, and bites out.] It took me a year of therapy and help to recover from the ordeal. I am still fighting with every ounce of my being to remain sober.
She has since returned to my life as a sort of arch nemesis. One with whom I share a very intimate history. She's in prison at present. But we... correspond, now and again. Via letters. [He twists his head away.]
Our topic of interest is that of the human connection. Something we neither of us feel is something attainable. At least for our own lives. For all our moral incompatibilities, there is something we both share. An intellect that makes it impossible for us to understand, or desire, the company of those around us.
I make my living solving people. She has taken it upon herself, to play with them. Shuffle them around and use their emotions to her own gain.