Where did Jesse James get shot?

For the most part, Jesse James was shot for the reward money and the noteriety.

Governor Crittenden has been negotiating with the Ford brothers to capture and bring in Jesse. Bob Ford, the younger brother, opted to shoot Jesse twice in the back of the head while he was adjusting a tilted picture at Jesse's house in St. Joseph, Missouri where they had been staying.

The Fords attempt to collect the reward was never realized. They were arrested, tried, and convicted fo first degree murder and sentenced to hang. Their sentences were pardoned by governor Crittenden.