Vasquez was arrested late Thursday. Espinosa was already in custody for an unrelated crime.
The Dallas County Medical Examiner’s Office has not yet determined how the baby died.
According to a CBS 11 News source, the parents told investigators the baby died a week earlier of natural causes, but that they were reluctant to call 911 for fear they would lose custody of their other children — both toddlers.
Officials with Child Protective Services (CPS) confirm the agency removed a one-year-old girl and a two-year-old boy from the couple last Friday. That action was just one day before police say they discovered the newborn.
A CPS spokesperson did not say why the agency took custody of the other children, but Dallas County Jail records show their father was arrested that day in a case involving a stolen vehicle.
CPS confirms the parents have 10 children in all, including the newborn who died.
Sources say the remaining 7 children are living with a relative, a result of an earlier CPS investigation, though the agency would not confirm the custody situation. It’s unclear when and how CPS first became involved with the family.