Though they initially believed the son was 19, they now say he may be in his early 20s.
The homeowner was also home, but officials say he was not involved in the shooting.
Three teens are dead after an alleged home invasion attempt reportedly ended in a shooting Monday.
It happened in the Wagoner County part of Broken Arrow, Oklahoma.
According to officials with the Wagoner County Sheriff's Office, three masked people broke into the house through the back door with the intent of burglarizing the home.
Officials say the homeowner's young adult son killed all three with an AR-15.
Though they initially believed the son was 19, they now say he was 23.
The homeowner was also home, but officials say he was not involved.
Deputies say two of the suspects were 17 and the other was 18. They say one had a knife and another had brass knuckles.
Officials say a fourth suspect will likely face charges related to the incident.
The 21-year-old female, who deputies say was the getaway driver, went into police custody.
She was later identified as Elizabeth Marie Rodriguez. She was eventually booked on three complaints of first-degree murder and three complaints of first-degree burglary.
In Oklahoma, those believed to be committing a felony that results in a death can face murder charges, even if they did not actually kill anyone.
Rodriguez reportedly knew who the homeowner was before the incident. A witness reportedly told investigators that Rodriguez had told the other three suspects to burglarize the home while she waited in the driveway. She reportedly drove away when she heard gunshots.
Rodriguez is being held without bond.