When Mathew Musladin went on trial in Santa Clara, Calif., for the 1994 murder of Tom Studer, his estranged wife’s fiance, the victim’s family showed support for Studer in an unusual way.

Sitting silently near the jury, family members wore buttons bearing a photo of Studer’s face every day of the trial. Musladin’s lawyer asked the trial judge to order the buttons removed, asserting they would prejudice the jury against his client. The judge denied the motion.