A woman killed an alleged gunman in self-defense after the assailant drove into her family and fatally shot a man and toddler near Montana’s Glacier National Park, police said Tuesday.
Authorities determined 37-year-old Derick Amos Madden, of Goldsby, Okla., “purposefully drove his vehicle” into Christina Siau’s family Sunday as they were walking alongside the road.
The two had previously been in a relationship together and Madden was “suffering from mental health issues,” police said in a statement. Police have not yet determined if Madden owned the gun legally.
Madden crashed his vehicle into a tree and proceeded to shoot at the family with a shotgun, killing 39-year-old David Siau and his daughter, 18-month-old McKenzie Siau. Other family members attempted to flee the scene on foot, but Madden shot and injured David Siau’s wife, 40-year-old Christy Siau, police said.
David Siau, 39, and his 18-month-old daughter, McKenzie, were fatally shot in a village near Glacier National Park in Montana. David’s wife, Christy, was also shot and is in critical condition. Two other children are still alive. No arrests have been made.https://t.co/7T5wbshgV4
— Shannon Watts (@shannonrwatts) July 19, 2022
Two other children were present but managed to run away uninjured.
Madden then proceeded to attack and injure Christina Siau with a knife. Despite receiving “critical injuries,” she fought back and fatally wounded Madden, who died at the scene, the statement read. Authorities did not say how Madden died.
Christy, Christina, and McKenzie Siau were all transported to a hospital where McKenzie succumbed to her injuries.
“The attack was isolated to this incident with a clear nexus between the victims and Madden,” police said, noting the investigation is ongoing.
Madden had been working in East Glacier and Christina Siau was originally from New York and living in East Glacier, NBC Montana reported, citing Jody Hickey, a spokesperson for the Glacier County sheriff.
Christy Siau was previously a bookkeeper for the American Baptist Churches of New York State, and she and her husband David were members of the First Baptist Church of Hoosick Falls, N.Y., according to the outlet.