I am not sure if you are asking for some new viewpoint on the assassination or what. I think pretty much everything about that event has been well known for over a 100 years, so there really isn't anything new about it.
Some facts which aren't really all that well known might be....
John Wilkes Booth thought he would be treated as a hero for killing Lincoln because he thought everyone hated him as much as he. In actuality however, Booth did the South a great disservice, had Lincoln not been killed he would have been much kinder to the South than his following presidents were.
The night of the assassination was planned to be a night of treachery and confusion in the Capitol by Booth and his co conspirators. Others were to have killed the Vice President, the Secretary of State, the House Speaker so as to create a state of confusion and upheaval in the North, with no clear idea of who was to be the next leader.
Abe Lincoln and his wife Mary took a carriage ride that afternoon and discussed their plans for the future. Mary later commented that this was the most relaxed and at peace she had seen the president in years, and the first smile she saw on him in years as well.
Lincoln had supposedly foretold his death after a dream he had of being in the White House during a funeral, he asked a guard who had died and was told "the President".
Lincoln had only a bare minimum of protection that evening, the one guard assigned to watch the stairway to the balcony had dosed off while Booth slipped by him.
Sorry dont know if this was what you were looking for or not, good luck with your paper though.
