Seventeenth Judicial District Attorney Bill Quick filed four counts of attempted first-degree murder against 27-year-old William Idris Johnson.
The charges also include two counts of child abuse resulting in serious bodily injury.
Johnson's two kids, 18-month-old Cody, and 5-year-old Kaitlyn had serious injuries after the fire.
Cody Johnson is out of the hospital.
Kaitlyn is burned on 50 percent of her body, according to her mom.
District Attorney spokeswoman Krista Flannigan says William Johnson is still in the hospital, and the case is still sealed.
Rosie Jungst-Johnson, Johnson's estranged wife, had filed for divorce in January from her husband.
William Johnson is accused of severely beating her before setting their Northglenn home on fire.
Jungst-Johnson and her kids need funds for medical bills, a new home and furnishings for a new home after the fire. Two funds are set up for the young children. You can donate to the "Little Heroes Fund" at any Wells Fargo branch or the Rosie Johnson Fund 1st Bank Branch.
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