The death of Karen Diamond, 82, has turned the attack in Boulder, Colo., on marchers for Israeli hostages into a possible death-penalty case.

An 82-year-old woman burned in an antisemitic firebombing in Boulder, Colo., earlier this month has died, authorities said Monday, prompting an upgrade in charges against the person suspected of carrying out the attack.

Karen Diamond, 82, became the first death from the June 1 firebombing of a Boulder, Colorado, demonstration voicing support for Israeli hostages in Gaza.