OAKRIDGE — A local community is in mourning after a devastating residential fire early Tuesday morning claimed the lives of two young children. Their mother, 30-year-old Natalie Muller, has been arrested and charged with two counts of first-degree murder and aggravated arson in connection with the blaze.Emergency crews were dispatched to the 1400 block of Elmwood Drive at approximately 2:15 a.m. after neighbors reported seeing heavy smoke and flames billowing from the single-story home. Firefighters arrived to find Muller outside on the front lawn, suffering from minor smoke inhalation and minor burns to her hands.According to the initial police report, Muller told first responders that she had woken up to a house full of thick, black smoke. She claimed she frantically attempted to reach the bedrooms of her children—seven-year-old Leo and four-year-old Chloe—but was violently pushed back by the heat and flames. Firefighters eventually breached the children's rooms, but both siblings were pronounced dead at the scene. Preliminary reports indicate the cause of death was severe smoke inhalation. However, the tragic narrative of a desperate rescue attempt quickly unraveled as investigators sifted through the ashes.During a press conference on Wednesday afternoon, Oakridge Police Chief Marcus Vance stated that the physical evidence directly contradicted Muller's timeline and account of the events."While this is an unimaginable tragedy for our community, the evidence gathered by the State Fire Marshal’s office points to a deliberate and calculated act," Chief Vance said. "Investigators discovered multiple points of origin in the hallway connecting the master bedroom to the children's rooms, as well as the presence of a chemical accelerant. Furthermore, the home's smoke detectors had been deliberately dismantled prior to the fire."Neighbors expressed shock and disbelief, though some noted that the household had been tense in recent weeks. "You'd see the kids playing in the sprinkler, and it looked like a normal family," said next-door neighbor David Hodges. "But there was a lot of yelling late at night recently. Still, you never think something like this could happen right next door."Court records indicate that Muller was going through a highly contentious custody battle with her estranged husband, who was out of state at the time of the fire.Muller appeared before a judge on Thursday morning for her arraignment. Dressed in a county-issued jumpsuit and displaying bandages on her hands, she stood silently as the charges were read. Citing the severity of the alleged crimes and deeming her a significant flight risk, the judge ordered Muller to be held on a $4 million bond.She is currently being detained at the Oakridge County Correctional Center. If she is able to post bond, she will be required to wear a GPS monitor and surrender her passport. Her preliminary hearing is scheduled for July 12th.