¹ "Jelly" (shortened from "Jellybean") was a childhood nickname, due to his poise and his well-groomed appearance (although some associate the nickname with the explosives used to open bank safes).
* According to Jay Robert Nash (no relation), Annals of Crime:
The three assailants all held Thompson submachine guns and . . . shouted to the lawmen: "Up! Up! Get 'em up!" The four lawmen outside the car, Agent Vetterli, Agent Caffrey, Detective Hermanson, and Detective Grooms, stood motionless for some seconds, their eyes riveted on the three gangsters slowly approaching, guns aimed directly at them.
Then Grooms' hand instinctively reached into his coat pocket and he withdrew his police revolver. He fired two shots, and although one appeared to hit a heavyset gunman in the arm, the gunman showed no signs of being wounded.
"No! No!" Frank Nash shouted from inside the car.
Then one assailant said "Let 'em have it!" to the other two gunmen.
Three submachine guns sent a torrent of bullets into Caffrey's car and sprayed the group of officers inside and outside the car. Two of the assailants ran around behind the Caffrey car, continuing to fire at it so that it was caught in a cross fire. Within seconds, the killers fled and five men were dead: FBI agent Caffrey, Chief Reed, detectives Grooms and Hermanson, and Frank Nash, the very man the attackers had intended to free. Nash was not wearing his traditional wig when found behind the wheel of the car. He had removed the wig and waved it at the machine gunners so that he could be properly identified.