BELLEFONTE, Pa. — Jerry Sandusky, a former Penn State assistant football coach, was convicted Friday of sexually abusing young boys, completing the downfall of a onetime local hero in a scandal that shook a proud Pennsylvania community, a prominent American university and the world of major college football.

A jury in Centre County Court convicted Sandusky, 68, of sexually assaulting 10 boys, all of them children from disadvantaged homes whom Sandusky, using his access to the university’s vaunted football program, had befriended and then repeatedly violated. The jury, seven women and five men, more than half with ties to Penn State, returned a verdict on the second day of deliberation.

Sandusky stood stoically as the jury foreman read off the verdicts on the 48 counts against him. The foreman said guilty 45 times. Many of the charges, which include rape and sodomy, carry significant prison terms, and it seems likely that Sandusky will spend the rest of his life behind bars. Sandusky was taken into custody after the verdicts were read.

The case against Sandusky, even before his trial, had exacted an enormous toll. Joe Paterno, the university’s famed head coach who had been alerted to at least one of Sandusky’s attacks on a boy, was fired, went into a kind of exile and was dead of cancer within months. The university’s longtime president, Graham B. Spanier, was dismissed as well, and Penn State officials, alumni and students were forced to confront the possibility that the interests of big-time college sports had trumped concern for the welfare of vulnerable children.