New Trial Granted Due to Racially-Biased Comments by One Juror in Minnesota Federal Trial

http://m.startribune.com/north-minneapolis-man-granted-new-trial-after-evidence-federal-juror-made-racial-remarks/481007841/?section=%2F

Deja Vu: Facebooking Jurors Cause a Reversal of a Murder Conviction

This time it's in Iowa.  A murder conviction was reversed by the appellate court due to prejudice to the defendant from contacts on Facebook some of the jurors had both before and during deliberations. Pre-deliberations one juror discovered that one of the defendant's relatives was her Facebook friend.  During deliberations a juror shared that on Facebook there were posts about rumors that there would be a riot or violence if the defendant was not found guilty of something.
LINK: https://cdn.radioiowa.com/wp-content/uploads/2018/04/Christensen-opinion-PDF.pdf

British Juror Gets Suspended Jail Sentence for Internet Research

Once again, a juror is sentenced to jail, though a suspended sentence, for violating the judge's instructions by doing Internet research.
Link:
http://www.guardian-series.co.uk/news/16164599.Juror_avoids_jail_after_internet_research_of_case_forces_retrial/

Jurors Sometimes Violate Social Media Admonitions Because Judges' Instructions Confuse Them

https://www.economist.com/news/books-and-arts/21740393-legalese-used-their-instructions-can-be-baffling-it-neednt-be-too-often-juries?fsrc=scn/tw/te/bl/ed/toooftenjuriescomprise12confusedmenandwomenjohnson