A totally innocent husband, who discovers that a wife or child is missing, and could be in who knows what danger, where minutes could make the difference between finding her safely alive or not, should he -
A. Contact the police immediately, tell them everything he knows about where she last was and possibly might be and encourage them to mobilize all resources to find her? or
B. Follow your advice and contact an attorney and shut up.
I suppose if you never want to see your family member again, you might follow option B.
I can see you need to see that video... :-)
The attorney can provide all the details necessary for the search of a missing person.