Eighteen months later , Abe goes to visit Mary who had been in the care of a doctor investigating the illness in vain hope of finding a cure . As Abe cleans wounds caused by her restraining shackles , Mary grabs his hand , scratching his skin , infecting him ( much to his horror ) , and forcing him to kill her . Knowing he is himself incurable , Abe requests that a message be sent to John Wilkinson , as earlier he had discovered that Wilkinson was actually John Wilkes Booth who had a plot to kidnap Lincoln in response to the end of the war and the Union the victor . The message gives Booth the information to know exactly where Lincoln would be the following night at the theater , thus leading to his assassination ( purposely arranged by Lincoln to prevent another outbreak ) at Booth 's hands
assassination
Assassination of Abraham Lincoln
Abraham Lincoln vs. Zombies