Kevin R. Steele, the district attorney from Montgomery County, Pennsylvania, has already said he will seek a new trial against Cosby.
In an exclusive interview with CNN's Jean Casarez, attorney Brian McMonagle said the jury's inability to reach a verdict made it clear the trial should end.
In December 2015 - five months after 35 other women offered similar accounts of sexual assault at the hands of Bill Cosby in a NY cover story - Montgomery County prosecutors charged him with three felony counts of aggravated indecent assault.
Jurors considering the fate of Bill Cosby at his sexual assault trial asked for a definition of "reasonable doubt" on their fifth day of deliberations Friday, a day after telling the judge they were deadlocked on all charges.
District Attorney Kevin Steele vowed to try the 79-year-old Cosby a second time, saying accuser Andrea Constand supported the decision.
Cosby - who is legally blind and carries a cane - then had to endure a taxing trial, the attorney said. "That, and the fact that the statement's tone was interpreted by many as something of a victory lap led to social media users blasting Camille Cosby for everything from perceived insensitivity to victims of sexual assault, to outright collusion with Bill Cosby".
Media organizations including The Associated Press are seeking the jurors' identities. A hearing is scheduled for Tuesday.
Prosecutors plan to retry Cosby and say releasing the names of the jurors could make it more hard to select an impartial jury in the next trial.
Prosecutors in Bill Cosby's sexual assault case are fighting to keep the jurors' identities a secret.
One of the judges on the case said he'd like a retrial to begin within 120 days.
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In 2005, prosecutors declined to charge Cosby based on Constand's account that the celebrity offered her unidentified pills that left her unable to stop his advances.
But it was his reputation as a public moralist who urged young people to pull up their saggy trousers and start acting responsibly that prompted a federal judge to unseal portions of an explosive deposition he gave more than a decade ago as part of Constand's civil lawsuit against him.
"I would say we would have voted to convict", he said.
Mike McCloskey told WDVE-radio 102.5 FM that he and other alternates were kept separate from other jurors during deliberations in eastern Pennsylvania which ended in a deadlock.
"I was ridiculously sick", when he found out about the mistrial.
Andrew Wyatt raises his fist as Bill Cosby exits the Montgomery County Courthouse after a mistrial was declared in Norristown, Pa., Saturday, June 17, 2017. He said the encounter was consensual. The trial took place outside Philadelphia, but the jury came from the Pittsburgh area.
He says he'd expected the jurors to break their silence on the bus ride back to Pittsburgh. As the days passed, the jury repeatedly asked to rehear portions of the testimony.
The names remain shielded under a protective order that several news outlets have challenged.
In a report from the Philadelphia Inquirer, one of the women speaking out against Cosby commented on how society failed to value a woman's worth in this case.
It was the only criminal case to arise from allegations from more than 60 women that cast Cosby as a serial predator who gave drugs to women before violating them.