Karpis continued his crimes with others, but had to keep on the move more than ever, as he was the fourth and last of the FBI's Public Enemies Number One, the previous three—John Dillinger, Pretty Boy Floyd and Baby Face Nelson—having been killed. He did manage to pull off a crime that echoed the times of the "Old West," a train robbery in Garrettsville, Ohio, which netted $27,000. After the death of Ma and Fred, Karpis allegedly sent word to FBI chief J. Edgar Hoover that he intended to kill Hoover the way Hoover had killed Ma and Fred. According to Karpis in "The Alvin Karpis Story", the death threat was a rumor started by Hoover himself.