Eurojusts supports various stages of cross-border investigations. Some cases take place over just a few days, whereas more complex investigations can last several years.

Case by case, Eurojust ensures the coordination of investigations by promoting the exchange of information, detecting cross-links between ongoing investigations, developing prosecutorial strategies, and implementing joint actions. Often, serious jurisdictional issues must be solved; the judicial authorities must decide where a suspect best can be brought to trial.

National authorities in the Member States are able to reach out to Eurojust for information and support at any point during a criminal investigation and, in urgent cases, can contact the Agency 24 hours a day, seven days a week.