Probably because he's got better judgement than most of the rest of that extended family. Just because he's saying "no comment" to the media doesn't mean he hasn't told police exactly when, where, and in what condition he last saw her. Under the circumstances, it's the right thing to do, to tell police and then leave it to them to share as much or as little about what they know and how they know it as they think is in the best interests of the investigation.
Your explanation is better than mine...:dance: