How did they access their chats?

[https://medium.com/@dataearn/how-did-authorities-access-snapchat-messages-in-the-menorca-flight-bomb-hoax-case-6760af15fe6c](https://medium.com/@dataearn/how-did-authorities-access-snapchat-messages-in-the-menorca-flight-bomb-hoax-case-6760af15fe6c)


is snapchat sharing these chats to fbi, are their keywords that alert their systems which then they'll look at and why was UK involved instead of spain?

alert chats cybersecurity fbi sharing snapchat spain systems