I'm not sure why both of you believe the impostor (mentioned account) is a real government agency without any type of verification. There was no way of knowing if the fool behind the account was a genuine FIOD agent.
I can think of a reason: timing:The account was created 2.5 hours before fiod.nl published this article, and posted about it 6 minutes after publication.
And why would FIOD create an account just to announce something that was already on blogs and news outlets?
Ask them? Their number is on their website 