The prosecutor said his office will review the case and "reevaluate" before deciding what to do differently.
However, at 10am this morning the jury returned again saying they could not break the deadlock and the trial was ended as a mistrial. That means for the next four months, Cosby will be a free man, as he was released on bail. Prosecutors say they will retry the case.
The revelations led newly elected Montgomery County District Attorney Kevin Steele to seek charges. It was read by a publicist. Constand did not appear at the news conference.
Cosby has suggested he may go back to comedy.
Cosby states that he invited her over to discuss business matters, but Constand states that Cosby had a romantic interest in her from the start, according to People.
Over the past 10 days, jurors heard the entertainer's defense that the encounter was consensual, while Constand, taking the stand and facing Cosby for the first time, testified that Cosby drugged her and robbed her of the ability to consent.
According to Variety, Cosby looked subdued and somewhat dazed as the judge made the announcement after almost a week of deliberations.
She could have easily put an end to Cosby's predatory behavior, by simply calling him out on it.
Prosecutors said immediately that they would retry the Cosby Show star, and he remains charged with three counts of aggravated indecent assault.
The jury could not reach a verdict in the trial of Bill Cosby.
Cosby was was accused of sexual assault with Andrea Constand, claiming that he drugged and attacked her at his Philadelphia home in 2004.
During the 11-day trial, Cosby's lawyers did not deny the substance of the allegations.
After the mistrial announcement was made, Cosby's spokesperson Andrew Wyatt told a crowd outside the courthouse that Cosby's "power is back".
The Pennsylvania jury that deadlocked on the fate of Bill Cosby mirrored the split in the court of public opinion.
The statement came the day after NPR broadcast an awkward interview with Cosby - awkward because Cosby did not utter one word when repeatedly asked about the charges against him. On Thursday, jurors announced they were deadlocked.
During their deliberations, jurors sent a string of questions to the judge, asking to rehear the testimonies of five trial witnesses and Cosby's previous deposition testimony.
But lawyers for the man once known as America's Dad say they've had enough. Judge Steven O'Neill told the jury he could not provide additional information.
Jurors began deliberating late on Monday (June 12), as Vulture reports.