Killed in the attack on the Blackfeet Indian Reservation in northwestern Montana were David Shiau, 39, of Syracuse, New York, and Shiau’s 18-month-old daughter, McKenzie. The shooter, Derick Amos Madden, 37, had a previous relationship with the woman who killed him and had mental health issues, according to the Glacier County Sheriff’s Office. Madden drove his vehicle into the Xiao family shortly before 9 p.m. Sunday as they walked along a road in the small town of East Glacier Park, hitting some of them before crashing into a tree, the sheriff’s office said. As family members tried to run, Madden shot and killed David Siau and fatally wounded McKenzie. The young woman was being held by her mother, Christy Siau, 40, who was shot and wounded. After running out of ammunition, Madden used a knife to attack and critically injure Christina Siau, 30. But she fought back and fatally wounded Madden, who died at the scene, authorities said. Two minor children who were present managed to run away and escaped injury. McKenzie Siau was later pronounced dead at the Indian Health Service Hospital in Browning. Christy and Christina Siau were taken to hospital with serious injuries. Authorities were still trying to determine if Madden, who was from Goldsby, Oklahoma, had the shotgun legally. The sheriff’s office described it as an “isolated … incident with a clear connection between the victims and Madden” and said the investigation is ongoing. It was not clear what prompted Sunday’s attack beyond the previous relationship between Madden and Christina Siau. Local authorities were not aware of any prior interactions Madden had with law enforcement. He had recently been working in East Glacier, a tourist town and gateway to the mountains in Glacier National Park, according to Jody Hickey, spokeswoman for Glacier County Sheriff Vernon “Napi” Billedeaux. Christina Siau was originally from New York and lived in East Glacier, where she was visiting family, Hickey said. Christy Siau was a former librarian for the American Baptist Churches of New York State, according to the organization’s social media posts. He was described as a “much-loved member” of the organization’s staff in a statement by Executive Minister Ad. James Kelsey. Christy and David Siau were also active in First Baptist Church of Hoosick Falls, New York, Kelsey said.
