Boulder’s Jewish community is mourning a new loss after leaders of the Boulder Jewish Community Center said Karen Diamond, 82, died on June 25 from injuries she suffered in the June 1 firebomb attack in downtown Boulder. Prosecutors said she was among the demonstrators targeted in an assault that has already produced state murder charges and a federal hate crime case.

The death adds a fatality to an attack that had previously left 13 people physically injured and many more shaken. According to prosecutors, 29 people have now been identified as victims of the incident, including people who were not physically hurt but were close enough to be placed at risk. The case has become one of the most closely watched hate-crime prosecutions in Colorado this year.

Diamond was remembered by community leaders as a longtime volunteer and by Gov. Jared Polis as someone whose loss will be felt far beyond her immediate family. The Boulder Jewish Community Center said in an email that she will be deeply missed. Prosecutors said her family has asked for privacy.

Authorities allege that Mohamed Sabry Soliman used Molotov cocktails during a demonstration in support of Israeli hostages in Gaza, posing as a gardener and wearing a construction vest so he could move closer to the group before launching the attack. Investigators say he told them he intended to kill participants at the weekly gathering. The AP reported that he shouted “Free Palestine” as he threw two of more than two dozen incendiary devices he had prepared.

Soliman already faced dozens of state charges including attempted first-degree murder and use of an incendiary device before prosecutors added first-degree murder after Diamond’s death. He has also been indicted on 12 federal hate crime counts and pleaded not guilty in federal court. A preliminary hearing in the state case is set for July 15.

The broader legal and political context remains active. Prosecutors have said the victims were targeted because of their perceived or actual national origin, while noting that an attack motivated only by political views would not meet the federal hate-crime standard. The AP also reported that the suspect told investigators he had tried to buy a gun but could not do so because he was not a legal citizen.

The attack took place against a backdrop of continuing war in Gaza and heightened tension around Israel-related demonstrations in the United States. But the Boulder case has also become a local story about a community member remembered for decades of volunteer work and civic involvement. Diamond and her husband had helped with synagogue activities and with historic preservation efforts, according to people who knew them.

Community leaders said Diamond’s death would be felt not only as a legal milestone but also as a personal loss in a city that had already begun processing the attack as a collective trauma. For Boulder, the announcement has turned a severe injury into a confirmed death and renewed attention on the next stages of the criminal case. The courts now face a prosecution that has expanded from an attempted mass attack into a homicide case as well.