Sept. 1 (UPI) — A North Carolina grand jury has indicted a 17-year-old girl as an adult on charges of murder stemming from allegations that she aided and abetted two other teens who killed three people in a hate-filled attack on a San Diego mosque before taking their own lives.

Caleb Vazquez, 18, and Cain Clark, 17, are alleged to have shot and killed three people, including a security guard, at the Islamic Center of San Diego in California on May 18. Their bodies were found dead from apparent self-inflicted gunshots in a car parked near the scene.

On Monday, Forsyth County District Attorney Jim O’Neil told reporters during a press conference that a 17-year-old girl was arrested last week in North Carolina and that a grand jury indicted her on three counts of first-degree murder and one count of conspiracy to commit first-degree murder, on allegations that she livestreamed the attack, disseminated the recording afterward and released the manifesto the attackers authored to justify their crime.

Court documents identified the suspect as 17-year-old Sarah Lindsey Santiago.

“Today’s indictment sends a clear message: physical distance from an attack does not place someone beyond accountability for the role they allegedly played in making it happen,” Special Agent in Charge Mark Remily of the FBI San Diego Field Office said in a statement.

“In today’s threat environment, individuals may believe they can encourage or facilitate acts of violence from hundreds of miles away without facing consequences. This case demonstrates that law enforcement will aggressively investigate those connections and pursue accountability wherever the evidence leads, including when juveniles are involved.”

According to the indictment, she is also alleged to have purchased a “Sonnenrad” patch for Vazquez, which he wore during the attack. According to the advocacy organization Anti-Defamation League, the Sonnenrad, which translates to “Black Sun,” is a symbol associated with White supremacy and was adopted by the Nazis in the 1930s.

The court document states that the conspiracy charge stems from allegations that she, Clark and Vazquez planned to murder worshipers at the Islamic Center of San Diego but also worshipers at Kehilat Ariel Messianic Synagogue, which is also in San Diego, and Black students at an unnamed public high school.

O’Neil, in the press conference, said that aiding-and-abetting charges in North Carolina come with the same penalties as if the accused had perpetrated the crime.

“So, she didn’t have to be in California. She’s in our jurisdiction. And today, a grand jury indicted her and held her responsible for her actions,” he said.

According to police, the shooting occurred at about 11:42 a.m. on May 18.

Shortly before, at about 9:40 a.m. that morning, San Diego police received a call from Clark’s mother reporting her son was suicidal and that several of her weapons and her vehicle were missing. Her son was with a companion, both dressed in camouflage, she said.

San Diego police were working to locate the teens when the first calls of the shooting at the mosque came in.

The suspects parked in the Islamic Center’s parking lot, ran past security and opened fire, hitting 51-year-old Amin Abdullah, who exchanged gunfire, wounding Clark. Abdullah has been heralded as a hero who saved lives by initiating lockdown protocols before dying from his injuries. O’Neil said there were 140 children on the premises at the time of the shooting.

The two suspects entered the building, but then exited through the back door and into the parking lot, where they encountered Mansour Kazhia, 78, and Nadir Awad, 57, whom they shot and killed.

The suspects fled the scene in their vehicle, from which they shot at a gardener who was uninjured, before dying by suicide.

Searches of residences associated with the suspects uncovered more than 30 guns and a crossbow, including rifles, along with ammunition, tactical gear and electronics.

“There exists in our world an underground subculture. It’s an echo chamber of intense hate against different cultures and religions. Cain and Vasquez, by what is contained in their manifesto, seemed to hate everyone, regardless of skin color, politics, religion or ethnicity,” he said.

“And this underground subculture of hate, they listen to each other, they talk to each other in encoded platforms. It radicalizes one another to the point where they carry out these horrific crimes of violence and murder.”