James C. Nelson

In 1997, Nelson wrote the court's opinion in Gryczan v. Montana striking down as unconstitutional a law that had criminalized gay sex, six years before the U.S. Supreme Court ruled similarly in Lawrence v. Texas.[2]

In 1997, Nelson wrote the court's opinion in Montana v. Siegal ruling that police usage of thermal imaging technology to find a marijuana growing operation required a search warrant, four years before the U.S. Supreme Court ruled similarly in Kyllo v. United States in a decision written by Justice Antonin Scalia.[2]

In a 2009 child custody case between two same-sex partners, Kulstad v. Maniaci, Nelson gained attention from the media and civil rights groups for his concurring opinion that stated:

Naming it for the evil it is, discrimination on the basis of sexual orientation is an expression of bigotry. And, whether rationalized on the basis of majoritarian morality, partisan ideology, or religious tenets, homophobic discrimination is still bigotry. It cannot be justified; it cannot be legalized; it cannot be constitutionalized ... Lesbian and gay Montanans must not be forced to fight to marry, to raise their children, and to live with the same dignity that is accorded heterosexuals. That lesbian and gay people still must fight for their fundamental rights ... speaks, in unfortunate clarity, of a prevalent societal cancer grounded in bigotry and hate.[5][6][7][8][9][10][11][12][13][14][15]

In 2010, Nelson wrote the court's unanimous opinion striking down a court rule that had previously prohibited the inclusion of forensic evidence because the medical examiner could not determine the cause of death. Nelson's ruling made it easier for prosecutors to introduce evidence against defendants by discussing past crimes, behaviors, and events. In this particular case, Nelson's ruling enabled prosecutors to bring in evidence of an infant's brain bruising and multiple rib fractures in prosecuting the infant's mother for murder.[16][17]