Hurblut said he believed the children had been home-schooled, but couldn't say if authorities had been contacted in the past about their living conditions.
Ina Rogers of Fairfield told reporters Monday that she called authorities in March after her 12-year-old son didn't come home.
Allen is being held on a bail of $5.2 million.
Police say once they arrived at the home, they conducted a search due to concerns for the safety and health of the child and the child's siblings.
The man, David Turpin, and his wife, Louise, previously pleaded not guilty to torture, child abuse and other charges in a case that has drawn global attention since the couple's 17-year-old daughter escaped the family's home in Perris, California, in January and called 911.
The officers found the boy and returned him to the family home, where they said they found nine other children living in "squalor and unsafe conditions".
All 10 children, meanwhile, were placed into the care of the Solano County Child Welfare office.
During the following six weeks, investigators say the children started to open up about how Allen was treating them.
"The children described incidents of intentional abuse resulting in puncture wounds, burns, bruising and injuries consistent with being shot with a pellet gun or a BB gun", Hurlbut said. As the investigation continues, Henry said there's a "good chance" Rogers could face additional charges.
An investigation by Child Welfare Services, the Solano County District Attorney's Office and Fairfield Police uncovered "a long and continuous history of severe physical and emotional abuse of the children", the news release stated. All 10 children shared one bedroom, a sleeping arrangement that their mother said is what they wanted. She didn't say why.More news: Khloe Kardashian shares first video of baby True
"But my husband is an awesome person".
Aleida Quartman, 23, said she was a co-worker of Rogers' at a heart device monitoring company.
Children taken from a squalid California home had been tortured for "sadistic purposes", a prosecutor has alleged.
Fairfield is 46 miles northeast of San Francisco.
Court records do not indicate whether the parents have lawyers.
"She told me she's never lived alone and now that her kids are gone and her husband is gone, she's just a mess", Quartman said.
Rogers said that the children are with Rogers' mother and sister. Three she had before meeting Allen and eight more in the past 10 years.
Peggy Allen, the mother of Jonathan Allen, said she had talked to Rogers about the condition of the home, saying it was important to keep a clean house.
The parents would wave when leaving the driveway, but he never saw the children in the yard or heard them playing in the backyard pool.
"She was pretty concerned, and she was like, you know, running around the neighborhood", Magney said, adding that he was "shocked" to learn that 10 children were living in the house, the Chronicle reported.