BELLEFONTE, Pa. — Jurors in Jerry Sandusky’s child sex abuse trial listened again Friday to testimony from a key prosecution witness against the former Penn State assistant football coach, then went back behind closed doors for a second day of deliberations.

The jury had talked for more than eight hours Thursday before adjourning at the end of a long session that featured dueling portrayals of Sandusky as a “predatory pedophile” or the victim of a conspiracy between investigators and his accusers.