State-by-state guide:

Wyoming

Wyo. Stat. § 14-6-224(b) (1999): Members of the public are to be excluded from proceedings, except contempt hearings, unless the court finds that a person has a proper interest in the proceeding or the work of the court.

Wyo. Stat. § 14-6-239 (1999): Records cannot be disclosed to the public except as in § 14-6-203(g).

Wyo. Stat. § 14-6-203(g) (1999): All information, reports or records made, received or kept by any municipal, county or state officer or employee evidencing any legal or administrative process or disposition resulting from a minor’s misconduct are confidential. However, the records may be disclosed if authorized by the District Attorney, the juvenile is under 18 years of age and one of his parents authorizes disclosure, the juvenile is at least 18 years of age or older and authorizes the disclosure himself, the disclosure results from the information being shared with or between designated employees of any court, any law enforcement agency, any prosecutor’s office, any employee of the victim services division within the office of the attorney general, any probation office or any employee of the department of family services or the school district, or the disclosure is made to a victim of a delinquent act constituting a felony. Finally, records are not confidential if they involve any matter, legal record, identity or disposition pertaining to a minor charged or processed through any municipal, justice of the peace or county court.

Wyo. Stat. § 14-6-241 (1999): A juvenile adjudicated delinquent for committing an act other than a felony may ask the court for the expungement of his record upon reaching the age of majority. Upon entry of an order expunging the records, the case is deemed never to have occurred.