A source close to the investigation said the development does not mean that investigators are turning their focus on Sergio Celis in the disappearance of his daughter. A police statement released Friday said it is "common practice for CPS [Child Protective Services] to become involved in investigations regarding missing children."
Calls to Sergio Celis and his wife -- who are no longer living together -- were not returned today. Other family members reached by phone refused to comment.
The police statement said new information regarding the welfare of the older Celis children led detectives to contact officials with Child Protective Services and call in Isabel's family for a meeting Friday. The statement did not specify what prompted the detectives and child welfare workers to take action.