The estranged wife of accused murderer Robert Durst filed a $10 million defamation suit against tenants who set up websites calling her and her son “abusive landlords” and Durst a “murderous and animal-decapitating sociopath.” Debrah Lee Charatan, who co-owns BCB Property Management, and her son Bennat Charatan Berger, who partly controls Novel Property Ventures, own multifamily buildings across the city.