Prosecutors called 13 witnesses over five brisk days.
In a 2005 deposition, Cosby admitted obtaining seven prescriptions for Quaaludes, a disco-era party drug, from a Hollywood gynecologist in the '70s.
Cosby's high-priced legal eagles have asked for a mistrial stating that the witness was offering observations about the once-beloved Fat Albert creator.
"I've warned this court that this woman has been rooting for the Commonwealth in this case", he said, saying Valliere has made posts on social media "declaring victory". Cosby, whom the 44-year-old Constand said she regarded as a mentor, was a Temple trustee at the time she worked in the university's athletic department.
"Was it in your mind that you were going to use these Quaaludes for young women that you wanted to have sex with?"
He testified previous year that he had talked with Cosby's lawyer before making his decision and that it was meant to let Cosby speak freely at a potential civil deposition - the same deposition that prosecutors are now relying on at his trial.
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Mr Cosby's explanation was contained in a deposition he gave over a decade ago as part of a lawsuit filed by Andrea Constand, the woman whose allegations resulted in the only criminal charges brought against the TV star.
That 2005 suit was eventually settled out of court for an undisclosed amount.
The prosecution rested their case Friday, which means the trial will be turned over to Cosby's defense attorney - who still isn't ruling out the possibility that their client might testify. His lawyers also declined to disclose their strategy or say who will testify when they begin presenting their case.
For the jury, this could be the closest it comes to hearing from Cosby himself because he has stated he will not take the stand. "We're weighing every option", Wyatt said.
"We are feeling great about the trial this week", said Wyatt.
The lengthy transcript describes how Cosby tried to negotiate with Constand's anguished mother when she had just learned of the alleged incident at Cosby's suburban Philadelphia estate.
Varying testimonies suggest Constand had between one and a half and three pills, which would range from 37.5 to 75 milligrams. At its base, their task is to decide if they believe Andrea Constand's accusation that the entertainer gave her pills one night in 2004 that left her essentially powerless, then sexually assaulted her.
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Cosby admits "attacked" during their conversation and he told Gianna he had touched Andrea's breast and vagina but "guaranteed... there was no penile penetration".
In the deposition, which became public almost two years ago, Cosby said he gave Constand three half-tablets of the cold and allergy medicine Benadryl. An analysis of the pills conducted by National Medical Services in August 2015 determined the pink pills to be Benadryl.
"It can cause significant sedation".
"People who go through these events can be depressed, anxious", she said. Constand refused the offer and reported Cosby to police, suing him after prosecutors failed to file charges.
Veronique Valliere, a psychologist and expert on victim response to sexual assault, testified for prosecutors that there are numerous reasons why sex assault victims delay reporting, including embarrassment or a fear of being judged.
If convicted, Bill Cosby faces 10 years in prison for each count.
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