The gunman also seriously injured two other members of the family. one of them fatally wounded him after attacking her with a knife, the Glacier County Sheriff’s Office said in a statement. The fatally shot victims have been identified as David Xiao, 39, and his daughter McKenzie, of Syracuse, New York. it happened Two other family members, Christy Siau, 40, and Christina Siau, 30, of East Glacier Park, were seriously injured in the attack, authorities said. A GoFundMe page identified Christy Siau as Mr. Siau’s wife and Christina Siau as his sister. The Glacier County Sheriff’s Office identified the gunman as Derick Amos Madden, 37, of Goldsby, Okla. The sheriff’s office did not provide a motive for the attack, but said Mr. Madden had previously been in a relationship with Christina Siau and had unspecified “mental health issues.” Just before 9pm local time on Sunday, Mr Madden ‘deliberately drove his vehicle’ into the family and, after crashing it into a tree, got out, armed with a shotgun and ‘started shooting at the same victims he had just had hit. or attempted to hit with his vehicle,” the sheriff’s office said in a statement. Mr. Madden fatally shot Mr. Siau and then continued shooting at the rest of the family as they left, according to the sheriff’s office. It wounded Mr. Siau’s wife, Christy Siau, and killed their 18-month-old daughter, McKenzie, who was being held by her mother, the authorities said. Mr. Madden attacked Christina Siau with a knife, the sheriff’s office said. “During this attack Christina fought for her life and, despite suffering serious injuries,” authorities added, “fatally wounded Madden,” who died at the scene. Two other children were present but managed to escape and were not injured, the sheriff’s office said. Authorities said the two women and the 18-month-old were taken to a hospital in Browning, Mont., which is about 13 miles northeast of East Glacier Park. The child was pronounced dead at the hospital and the two women were taken elsewhere to receive more intensive treatment for “critical injuries,” they said. The assault was “isolated in this incident,” the sheriff’s office added, “with a clear connection between the victims and Madden.” The investigation is ongoing, the sheriff’s office said. On Wednesday night, the Federal Bureau of Investigation released a video statement from John Xiao, David’s father and MacKenzie’s grandfather. He recounted what he said he had told his other children. “Be sad, be sad, but don’t be angry about what happened,” he said, “because what we saw is actually the result of someone who harbored anger in their life and allowed it to fester and allowed it to grow and develop into something very terrible and unspeakable”. He went on to quote passages from the Lord’s Prayer and said: “Our goal is to forgive.” Mr. Madden was formerly a member of the Oklahoma National Guard, but left around 2013 and had no further contact with the organization, said Lt. Col. Jeff Legler, a guard spokesman. Colonel Legler said Mr Madden was an expert in chemical operations and had been trained in how to identify dangerous chemicals and render some of them inert. Colonel Legler said he did not know Mr. Madden personally. Public records show that Mr. Madden lived in Oklahoma for several years. A friend of Christina Siau, Haley Driver, described her as “calm, cool and collected and such a joy to be around.” Ms. Driver said Ms. Xiao, who is a physician’s assistant, planned to move back to New York after nearly four years in Montana, having recently accepted a job in Ithaca, N.Y. “He is such a tough person,” Ms Driver said in a Facebook message. “I admire her so much for who she is and the value she brings to our lives.” The Siau family were active members of the Baptist church community in upstate New York. “We grieve with the Xiao and Brownell Families and stand with them during this time of unimaginable grief,” Justin Barata, who works at Missio Church in Syracuse, New York, said in an email. “It’s definitely a broken world.” Bethany Siau, David and Christina’s sister, set up a GoFundMe page to help with the family’s medical expenses. “The number of people already reaching out and offering to help is incredible,” he wrote on the fundraising website. “We appreciate you all.” Alex Traub contributed reporting.
