LYNBROOK - Police have made an arrest yesterday in the weekend murder of a Hempstead woman.Police say 38-year-old Dung Tran killed Maria Ayala, whose body was found in a parking lot on Merrick Road in Lynbrook Sunday.Ayala's son tells Newsday his mother and Tran were romantically involved. Tran is facing a judge today on murder charges. Investigators say he's also wanted by police in Virginia, but they are not saying why.