My plans were then simple, easy and straightforward. Kill the Queen and frame someone else for it. Why did I want to kill her in the first place? I had many many reasons. I was sick of her treating me the way she did because of what Lucas and Moira did. They turned Strigoi, not me. What had I done to deserve that kind of treatment? I also hated her for hating Christian. She loathed him because she felt he would turn Strigoi too and due to this reason, she tried her best to break Lissa and him apart. Another reason for murdering Tatiana was my Dimka. It was a miracle that he was a dhampir again. How could she not see that? Of course, now I know that she believed he was not a Strigoi. But at that moment, it had enraged me. And the last reason; she did not wish that Moroi should fight with the guardians, whether physically or with magic. This turned out to be false as well.
So technically speaking, I killed a Queen for personal reasons and not for the greater good. But as I said, at that moment, I had killed her on principle.
With my intentions out of the way, one may ask, why did I specifically make Rose take the fall? Why not just make it a murder mystery. Well, I have my reasons.
This is what I've written till now, I promise I'll update soon. Let me know what do you think :)