In Rare Cases Voir Dire May Be Closed to the Public

Here is a link to a recent trial in which, for the privacy concerns of potential jurors, voir dire (jury questioning) was closed to the public. The original conviction was reversed for juror misconduct.  The trial judge must make specific findings that closure is justified. 
https://www.gjsentinel.com/news/western_colorado/interviews-of-prospective-blagg-jurors-closed-to-public/article_94c11180-179e-11e8-96c9-10604b9f1ff4.html

Trial Court Needs to Investigate Colorable Claim of Extraneous Influence on a Juror

Here is another case of a trial judge failing to investigate further alleged possible extraneous influence on a juror or juror misconduct during a trial:
http://www.opn.ca6.uscourts.gov/opinions.pdf/18a0025p-06.pdf

Juror Who Lied on Questionnaire Spends Day in Jail

A juror boasted to others that he had lied on his questionnaire.  Too bad for him that a prosecutor heard his boast.  Juror found in contempt and spent a day in jail holding.


http://www.post-gazette.com/local/south/2018/01/29/Allegheny-County-direct-criminal-contempt-juror-lied-Daniel-Puhala-Judge-Donna-Jo-McDaniel/stories/201801290097