This time it’s a federal case: George Barrett, who was hanged in 1936 for shooting an FBI agent. He was the first to die for that particular offense. The agent was shot in Ohio, but Barrett fired his gun from 22 feet over the Indiana state line.
Barrett’s death was society’s gain. Before he murdered Agent Klein he was a car thief and, in all probability, a three-time killer, though the jury waffled at every homicide trial.
The Charley Project Blog 
That’s got to be a first too, shooting somebody across state lines.