Later the same men arrive at an isolated farm house near Chicago, kill the occupants, and retrieve a stash of (very light) gold bars.
As the same gun was used in both cases, FBI director John High takes over the investigation, and assigns it to agents Jerry Cotton and his sidekick Phil Decker.
She is, however, able to reveal that the gang in planning a final heist, and to direct him to a bowling alley near Grand Central Station.
That same evening, Cotton, posing as an alcoholic ex-servicemen named Jimmy Logan, visits the bowling alley and soon confirms that the gang (Latschek, Percy, Sniff and Babe) are all employees there.
Fed up with Christallo's incompetence, Kilborne shoots him dead, and the rest of the gang members leave the hideout and go into hiding.
High confronts Hamilton, who agrees that a lot of relevant information is in his possession, but denies any involvement in the crimes.
As the villains force Decker back into the sea, Cotton calls in reinforcements and is transported to the scene by helicopter.