NEW YORK — Four family members were found dead inside a home in Rockland County early Saturday, in what authorities said appeared to be a murder-suicide involving a sergeant with the Bronxville Police Department. Officers with the Clarkstown Police initially arrived to perform a welfare check at 10 Clydesdale Ct. in New City, N.Y., just past midnight Saturday morning. Upon arrival, “officers made entry to the residence … and discovered four deceased persons,” the department said in a statement Saturday afternoon. “The deceased were all identified as members of the Morgan family — Watson Morgan…