Portions of plea hearing under seal in trial record are appropriately withheld given a sufficient showing of probable harm. Although the First Amendment applies to records of plea proceedings, here the court provided sufficient specific reasoning under seal, considered alternatives, and labeled the sealed sections. The common-law right of access is countered when it is the type of information that courts would normally protect, and there was sufficient risk of a clearly defined and serious injury.
http://www2.ca3.uscourts.gov/opinarch/172644p.pdf
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.