Manville has presented at 70 trainings: father’s rights, unwed parents, custody & HT issues && was an intensive FC therapist & family therapist. He retired after 22 years as a custody evaluator in Detroit. David is the BSW Advisor & Professor for SWRK School at EMU. Manville developed & teaches 1 of the only HT class in MI which is now be all year. He runs a field unit at EMU focusing on HT issues; has been called to Court as an expert witness in HT & is the advisor for student led UNMASKED HT group.