How did Bitfinex hackers get caught?

Could you elaborate on the process of how the Bitfinex hackers were ultimately apprehended? Was it through forensic analysis of the blockchain, collaboration with law enforcement agencies, or perhaps a combination of both? I'm particularly curious about the investigative techniques employed and any unique challenges that had to be overcome in order to bring these perpetrators to justice. Additionally, did the hack serve as a catalyst for improved security measures within the cryptocurrency industry?