Start with a breakdown of the demographics of Saratoga County, pull a list of the sex offenders from Saratoga and surrounding counties, narrow that list down to the offenders who had previously victimized similar persons, and then check to see which of those offenders have not followed through on all their probation-parole requirements.
If any are even tangentially associated with the family, hunt them down.
Cell phone pings will be checked as well.