I believe that if you had carefully read the brief article you link to, you would have had a clear idea and you would not ask that question.
As I understand it, the money never left Coinbase. Coinbase identified that transaction as suspicious, blocked it, and alerted the FBI, who would then confirm that it was fraud. The article doesn't say it exactly like that, but that's how I understand it.
What he said, coinbase was able to detect that the amount transferred from what I understood as a new account was too big that they flagged the account for inspection which revealed that it was a scam. It's basically the power of centralized exchanges, which is why "not your keys, not your coins" hold true to this, but well I guess that helped in saving the user from losing their funds completely. In this case the user was probably a newbie to crypto or only had minimal knowledge, which resulted in the scam.