Cosby, 79 and almost blind, is charged with three counts of aggravated indecent assault in connection with his encounter with Constand; if convicted Cosby faces years in prison. Each charge carries a possible 10-year sentence.
Sequestered for almost two full weeks, the jury from Allegheny County has been in deliberation since Monday evening.
Bill Cosby is trumpeting the news that the jury in his sex assault trial is deadlocked as "the justice he was looking for", his spokesman said Thursday. She testified that the pills made her legs feel "rubbery", that Cosby had touched her genitals and that she "wasn't able to fight in any way".
Bill Cosby leaves the Montgomery County Courthouse during his sexual assault trial, Tuesday, June 13, 2017, in Norristown, Pa. On Wednesday, they reviewed Constand's testimony from the week before about the night of the alleged attack and also requested read-backs of police testimony about Cosby's 2005 interview with police. Some of the allegation date back to the 1970s.
A hung jury would be a clear victory for Cosby, who would avoid what could have been years in prison.
Constand was challenged by Angela Agrusa, one of Cosby's attorneys.More news: 'Last Man Standing': CMT in Preliminary Talks to Revive Tim Allen Comedy
Cosby's lawyers have argued that Constand was a willing lover before she fabricated her account of the assault as a way of getting money from him.
By Wednesday night, jurors asked the judge several questions seeking clarification and re-reading of excerpts of Cosby's own words about his 2004 encounter with accuser Andrea Constand at his nearby home.
In late 2014, dozens of women went public with accusations that Cosby drugged and sexually assaulted them over the course of his lengthy comedic career.
During a lunch break Tuesday, Wyatt appeared on the courthouse steps to tell a crowd of reporters and cameras about what a defense witness would have said in court - damaging to the credibility of Constand - had O'Neill not barred her testimony as hearsay. (Cosby has told police investigators that he gave Constand the allergy medication Benadryl.) Twenty to 30 minutes later, she said, her mouth got "cottony", and her legs turned "rubbery", leaving her unable fend off Crosby's advances. He also denied a motion for a mistrial filed by Cosby's lawyer. He said she didn't show any ill effects from the medicine, nor did she object as he groped her.
Cosby, 79, was inside the courthouse waiting for the jury verdict on charges of drugging and sexually assaulting Andrea Constand, then a college administrator, in 2004.
Cosby is charged with three counts of felony aggravated indecent assault.More news: Death toll rises to 17 in London apartment block fire
The long-married Cosby, once known as America's Dad for his portrayal of kindly Dr. Cliff Huxtable on "The Cosby Show", called all the encounters consensual. This was the only case to result in criminal charges against Cosby.
Defense lawyers at the trial emphasized discrepancies in Constand's statements to police in 2005 in an effort to undermine her credibility.
When they were alone in the kitchen, he offered a few blue pills to help her with tension, Mason testified recalling his interview.
"I like the way she's thinking", fellow accuser Jewel Allison said.
Earlier in the week, the woman had driven a U-Haul truck around the courthouse with a drawing of a middle finger with Cosby's name on it plastered to the outside.More news: Father says Otto Warmbier 'brutalized and terrorized' in N. Korea
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