Hi Tim- This is what we have in Wisconsin:
Wisconsin State Statute 968.375(13): Disclosure without subpoena or warrant. A provider of electronic communication or remote computing service may disclose records or information described under sub. (2) (a) of a customer or subscriber or the content of communications of a customer or subscriber described under sub. (3) without a subpoena or warrant if any of the following applies:
(a) The customer or subscriber provides consent for the particular disclosure.
(b) The provider of electronic communication or remote computing service believes in good faith that an emergency involving the danger of death or serious physical injury to any person exists and that disclosure of the information is required to prevent the death or injury or to mitigate the injury.
As is the case in many missing persons cases, we do not necessarily know if it is a criminal matter or not, but as we know, when a child is missing, there should be a general belief that they are in danger until we can prove otherwise, whether they are a runaway child or not.