Jerry Sandusky leaving the Centre County Courthouse, on June 19,...

Jerry Sandusky leaving the Centre County Courthouse, on June 19, 2012. (Getty Images) Credit: Getty Images

The defense in Jerry Sandusky's child sex abuse trial rested its case Wednesday without calling the former Penn State University assistant football coach to the witness stand.

Closing arguments are expected Thursday. Jury deliberations could begin by the end of the week. Defense attorney Joe Amendola had said previously that Sandusky would testify.

Sandusky, 68, is charged with 51 counts of abusing 10 boys over a 15-year period.

Among its witnesses, the defense called Sandusky's wife Dottie, who testified on Tuesday that she had never seen anything inappropriate in her husband's behavior with children.

The defense also earlier presented testimony from a psychologist who said Sandusky suffered from histrionic personality disorder -- a condition characterized by excessive emotionality and attention seeking. Its symptoms include inappropriate sexually seductive or provocative behavior.

Eight alleged victims, now men aged 18 to 28, testified for the prosecution last week, describing being molested by Sandusky as boys, including oral and anal sex and shared showers. Two other alleged victims have never been identified.

Before resting their case Wednesday, Sandusky's lawyers sought to cast doubt on testimony from an earlier witness who told jurors he had seen Sandusky molesting a boy. Defense witness Dr. Jonathan Dranov testified that Mike McQueary, then a graduate assistant at Penn State, had told him that he hadn't seen Sandusky engaged in a sex act, contrary to the testimony McQueary gave last week.

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