A quick summary of Day 3 of the trial of former Penn State defensive coordinator Jerry Sandusky on over 50 charges of child sex abuse:

An alleged victim testified that he was threatened with never seeing his family again if he told of abuse.

Jurors listened to an edited audio version of Sandusky’s interview with Bob Costas, the one in which he struggled to answer Costas’s question: “Are you sexually attracted to young boys, to underage boys?”

The trial resumes at 9 a.m. EDT. See real-time updates after the jump and follow The Post’s Joel Achenbach on Twitter for updates. Warning: testimony is likely to continue to be graphic and disturbing.

A Penn State janitor testified that he saw Sandusky and a young boy leave a locker room in the football building in 2000, just before another janitor told him he saw Sandusky “licking” the boy. The janitor who allegedly witnessed the act now has dementia and could not take the stand.

Three more alleged victims testified Wednesday and the prosecution’s case is proceeding quickly, perhaps, The Post’s Joel Achenbach tweets, because “the defense lacks torpedoes.” (And, perhaps, because there’s nothing to be gained by vigorously cross-examining alleged victims, whose detailed testimony has been harrowing for them.) The judge expects the prosecution to be “comfortably” done Friday with only about three more victims expected to testify.

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More coverage

Day 3: Accusers say Sandusky used threats, gifts

Day 2: Witness weeps; McQueary testifies

Day 1: Witness says Sandusky treated him “as a girlfriend”

LaVar Arrington: Testimony is personal

The original grand jury report

A second grand jury presentment

Timeline: How the scandal unfolded

Early Lead: Sandusky’s wife says her husband is innocent

Early Lead: Sandusky tells Bob Costas he showered with boys but denies abuse