What is a child and family investigator? Your family law attorney may be suggesting you get a child and family investigator, or maybe the judge suggested one in your child custody case. In the State of Colorado, child and family investigators, or CFIs, play an important role in the family court system. CFIs serve as an investigative arm of the Court. A CFI can be appointed in your case to investigate what is in the best interest of your child. Often both parents want what is