Family members of a 92-year-old man killed in a two-vehicle crash last month in Teaneck say they are waiting for the Bergen County Prosecutor’s Office to complete an investigation that may provide them with answers on how the crash occurred. Albert Schnellbacher, a retired teacher and great-grandfather from Bergenfield, died after his SUV collided with a sports car about 2 p.m. on June 25 at the intersection of Windsor and Briarcliffe roads in Teaneck, authorities said. Schnellbacher was driving a 2008 Chevy Equinox that was struck by a 2022 Ferrari driven by a 61-year-old man from Franklin La…