Did this guy sign a release?
Why did Fox ask you to sign a release? Perhaps so they would be legal?
Totally steering a bit off topic, but here are the basics on a release. If you are not actually part of the story, a release is only needed if your likeness or quote is used directly in marketing or promotional material. That is even very gray and fuzzy depending on the circumstances of recording and how it is used. For man on the street type interviews, they arent required but many times, they get them just to be safe (CYA).
If, however, you are the story or part of the story, a release isn't needed.
It comes down to if they use you as marketing or news.