A mother shot and killed her three children after a three-hour-long standoff with police before turning the gun on herself.Brandy McCaslin, 39, had been having a 'supervised visit' with her youngest son Billy Jacobson, 10 months, when a police officer saw fireworks outside of her address in Verdigris, .Authorities confirmed that the lone officer went to investigate and called for back-up when they found McCaslin barricaded inside the home, armed with a weapon.
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