A Department of Children and Family Services spokesperson said both parents are under investigation for alleged neglect. Four of the couple's children have been removed from their care.
The fire department was called to the home Thursday morning and were unable to revive the twins.
The father, Josue Romero, 26, told ABC7 he returned home Thursday morning after dropping off four of his other children at school and found his 19-year-old wife, Veronica Rodriguez, in tears.
"I went to the room and I noticed she was crying on the floor in the closet, holding her head," he said. "She was trying to give my kids mouth to mouth, CPR. I checked the babies, they were blue. There was nothing I could do."
Relatives think the deaths are an accident. They say the twins normally sleep in their own cribs but were in one crib when they were found unresponsive.
DCFS has had previous contact with the family. On April 9th, a tipster called the DCFS hotline, alleging that the twins were neglected. In March of 2011, before the twins were born, DCFS officials say they investigated allegations of child abuse and neglect, not against the parents but other relatives. Shortly thereafter, in June 2011, DCFS says it opened a case with the Romero family, providing services and support.
Romero said his family, especially his wife, is having a difficult time.
"She's saying it's her fault. I'm saying, no it's nobody's fault, stuff happens. I wished this didn't happen like this," he said.
"It was an accident ... they do take care of their kids well ... I've been there with them," said an aunt, Ana Romero.