[tjalfi]

This. The video Don't Talk to the Police[0] has several concrete examples of how not taking the fifth amendment can be to your disadvantage.

[0] https://www.youtube.com/watch?v=d-7o9xYp7eE

[joshuamorton]

This is not a criminal proceeding.

[kbenson]

But the case has been referred to the authorities for a possible criminal case. In that light, there may be more reason to keep quiet.