Cosby, 79, has been accused by almost 60 women of sexual assault over the past several decades but Andrea Constand, the plaintiff in this case, was the only one still eligible to go to trial.
When the trial started on June 5, the jury of seven men and five women were bused in from Allegheny County near Pittsburgh and have since been sequestered in a hotel.
Jurors asked eight questions during their deliberations, largely to rehear testimony.
The testimony is relevant because Cosby is charged with giving pills to Constand, a former Temple University employee, to incapacitate her before their sexual encounter.
Bill Cosby shakes hands with his lawyer Brian McMonagle as they leave the Montgomery County Courthouse during Cosby's sexual assault trial, Thursday, June 15, 2017, in Norristown, Pa. He ordered them to keep deliberating.
"The judge can say, 'Do you think more deliberations would be helpful?' But the judge can't say, 'How are you split?'" explained Bradford Colbert, a professor at Mitchell Hamline School of Law in St. Paul, in an interview with Minnesota Public Radio.
In statements in 2005 and 2006, Cosby said he took an immediate romantic interest in Constand when after they met in 2003 through Temple University, where Constand worked as operations director of women's basketball and Cosby was a trustee.
A hung jury could represent a clear victory for Bill Cosby, allowing him to avoid what might have been years in prison for three counts of aggravated indecent assault.
Constand's complaint is the only one that has come to trial.
O'Neill on Friday noted the factors that could precipitate a mistrial - a jury request to halt deliberations followed by his own agreement that the impasse couldn't be broken.
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Jurors who have appeared stressed and even angry seemed more upbeat as they left court outside Philadelphia Thursday night than on previous nights, despite enduring another marathon session. Cosby, 79, pleaded not guilty to the three counts. "But, the judge also tells the jurors that they should not compromise their closely-held beliefs just to reach a verdict and go home". Montgomery County District Attorney Kevin Steele, right, Montgomery County Assistant District Attorney Kristen, center, and Bill Cosby's defense attorney Angela Agrusa enter the courtroom during jury deliberat.
Cosby has said he gave Constand the cold and allergy medicine Benadryl before their sexual encounter at his home in 2004. The judges overseeing those trials sent the jurors in both cases back to continue deliberations.
"They're conflicted about the inconsistencies in Ms. Constand's testimony", he told reporters on Thursday.
Constand sued in civil court, and Cosby provided a sworn deposition in which he said he had engaged in consensual sexual activity with Constand - and that he had obtained Quaaludes in order to give them to women with whom he wanted to have sex. "You're exhausted", O'Neill said.
In striking down McMonagle's latest request, the judge noted that Cosby publicist Andrew Wyatt has been giving his own explanations to media about deadlocks and mistrials.
According to the testimony, Cosby called himself a "sick man" and refused to identify the pills he gave her daughter.
Previously, jurors asked to hear again portions of Andrea Constand's testimony, Cosby's deposition and the testimony of Cheltenham Detective Sgt. Richard Schaffer.
Constand reported the incident to police in 2005, a year after the alleged incident.
Dozens of women have come forward to say he drugged and assaulted them, but this was the only case to result in criminal charges.





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