the photo as evidence ? In Memento , as the film ends , we see that Leonardo kills Jimmy Grantz ( who Leonard believed to be John G ) and then Teddy makes his appearance there . As Leonard becomes suspicious of him , Teddy tells the truth that Leo in fact had killed the real John G a year ago . Teddy makes Leonard believe so by showing him a photo ( taken by Teddy ) of his after he murdered that original John G. Leonard starts believing too .
So why did Teddy let Leonard murder a fake John G altogether ?
( Teddy tells Leonard that he thought Leo will remember by the help of his notes and photographs the fact that he had killed the real John G , but he disappointed him as Leonard chose to forgot instead . But Teddy could prove it anytime to Leo that they are done simply by showing that photograph . That photograph does work , no ? Why let Leonard kill a drug dealer who had not killed his wife ( the false Leo deliberately believes ) )
So why did Teddy let Leonard murder a fake John G altogether ?
( Teddy tells Leonard that he thought Leo will remember by the help of his notes and photographs the fact that he had killed the real John G , but he disappointed him as Leonard chose to forgot instead . But Teddy could prove it anytime to Leo that they are done simply by showing that photograph . That photograph does work , no ? Why let Leonard kill a drug dealer who had not killed his wife ( the false Leo deliberately believes ) )