Crime Estranged Husband Fatally Shoots Wife and Security Guard Who Tried to Intervene, Leaving 6 Kids Orphaned The children's aunt says all six children witnessed Sunday's killings, and that the security guard may have saved their lives By Chris Harris Chris Harris Twitter Chris Harris has been a senior true crime reporter for PEOPLE since late 2015. An award-winning journalist who has worked for Rolling Stone and MTV News, Chris enjoys prog rock, cycling, Marvel movies, IPAs, and roller coasters. People Editorial Guidelines Published on June 17, 2022 10:46 AM Share Tweet Pin Email Erica Chanon Pantoja. Photo: San Jose Police Department Six children in California are now orphaned after a double murder-suicide Sunday also claimed the life of a security guard who tried to intervene in what police described as a domestic dispute. According to a statement from the San Jose Police Department, 29-year-old Erica Chanon Pantoja's estranged husband, Salvador Pantoja, 33, showed up outside her apartment building early Sunday morning, and the two had an argument in the parking lot. Security guard Marco Carral Duran, 23, was working nearby, heard the couple fighting, and attempted to intercede, police said. "The suspect shot the uninvolved male at least one time and then shot the female as well," reads the San Jose Police statement. "The suspect was found at the scene deceased from a self-inflicted gunshot wound." The statement notes "the motive and circumstances surrounding the incident are under investigation." Maria Chanon, the aunt of the couple's children, spoke to ABC 7 News, and said they witnessed their mother's murder. Want to keep up with the latest crime coverage? Sign up for PEOPLE's free True Crime newsletter for breaking crime news, ongoing trial coverage and details of intriguing unsolved cases. "The oldest one who saw the whole incident, she still cries," Chanon said, adding her sister was planning on divorcing her killer. "She can't understand why her father would do that." Chanon said she believes Duran saved the children — who're aged 1 to 10 — giving them valuable time to escape the deadly situation. Meanwhile, the San Jose Police Officers' Association Charitable Foundation has established a special fund for the six kids. If you are experiencing domestic violence, call the National Domestic Violence Hotline at 1-800-799-7233, or go to thehotline.org. All calls are toll-free and confidential. The hotline is available 24/7 in more than 170 languages.