ANOM sting operation
A global operation where crime gangs were sold encrypted phones that law enforcement could monitor has led to more than 800 arrests and the seizure of 30 tonnes of drugs, millions of dollars in cash, weapons and luxury cars. The FBI helped to infiltrate 12,000 devices into 300 criminal groups in more than 100 countries, providing the FBI and its partner forces around the world with access to 27 million messages. The operation also revealed that gangs were being tipped off about police actions, which prompted "numerous high-level public corruption cases in several countries", according to an affidavit from an FBI agent.
Sources: ABC News