Since the United States has elected its first president in 1789, four presidents have been assassinated: Abraham Lincoln, James A. Garfield, William McKinley, and John F. Kennedy. Each murder is different. There's a different motive, and a different conspiracy for all four different assassinations. The only thing these murders have in common is that all four presidents have been shot.
Abraham Lincoln was shot on April 14, 1865 by John Wilkes Both in Ford Theater as Lincoln watched a play. Lincoln was watching from the State Box that was reserved for special guests. Both entered the box and shot Lincoln in the head from near point-blank range, struggled with someone sitting in the bow with Lincoln and
jumped out of the bow and on to the stage breaking his leg. After receiving treatment for his leg he was found in a barn and killed as he refused to come out.
Lincoln's murder was part of a larger conspiracy, headed by Both, to kill Vice-President Andrew Johnson and Secretary of State William Seward. All three men were to be killed approximately at the same time, but Johnson and Seward escaped the plot.
James A. Garfield was shot in Washington Railroad Station, as he was boarding a train, by Charles Guiteau on July 2, 1881. He lingered on his deathbed until September 19. Guiteau believed Garfield owed him a patronage possession in the diplomatic corps. Doctors could not find the bullet lodged in the Presidents back so Alexander Gram Bell was asked to try to find the bullet with an electronic metal detector that he had invented. Bell thought he had found the bullet several times but when the doctors operated the found nothing. After several attempts they realized that the metal springs in the president mattress were interfering...