An FBI investigation is a formal inquiry conducted by the Federal Bureau of Investigation to gather evidence and information about potential criminal activities. The FBI focuses on various issues, including terrorism, cybercrime, organized crime, and public corruption. Investigations can involve surveillance, interviews, and analysis of financial records. The process typically begins with a tip or evidence suggesting illegal activity. Agents may work with other law enforcement agencies and use advanced technology to track suspects. Once sufficient evidence is collected, the FBI may take action, which can include arrests or presenting findings to prosecutors for potential charges.