In Fairfax County, like many jurisdictions across the United States, child custody matters are primarily guided by the principle of the best interests of the child. This principle emphasizes that custody arrangements should be made with the child's welfare and well-being as the top priority. child custody attorney fairfax However, determining what exactly constitutes the best interests of the child can vary from case to case, depending on factors such as the child's age, existing relationships with each parent, and the ability of each parent to provide a stable and nurturing environment.