My general impressions are that nobody likes working with the FBI because they don't share information, but the secret service and postal service fraud unit both work extensively with people overseas. Countries which are members of either the EU or NATO tend to cooperate extensively with cybercrime investigations however those outside of that group do not. Many cybercriminals reside in the eastern bloc (Eastern Europe, Russia, China) and are protected by entrenched political and organized crime interests (usually by both at the same time).
My general impressions are that nobody likes working with the FBI because they don't share information, but the secret service and postal service fraud unit both work extensively with people overseas. Countries which are members of either the EU or NATO tend to cooperate extensively with cybercrime investigations however those outside of that group do not. Many cybercriminals reside in the eastern bloc (Eastern Europe, Russia, China) and are protected by entrenched political and organized crime interests (usually by both at the same time).