CASA Volunteers are citizens who are trained to advocate for the best interest of children in the foster care system. They are assigned to a child or sibling group and get to know the child, as well as biological parents, resource parents, caseworkers, teachers, therapists, and doctors. They meet with the parties on their case regularly, write reports to the court, and attend hearings to testify to what is in the child's best interest. They investigate, facilitate, advocate, and monitor throughout the life of the case, until the child achieves a safe and permanent home.