Latest: Bill Cosby knocked me out with pills before sex attack, woman tells court

Latest: Bill Cosby's chief accuser has given evidence at his sexual assault retrial, declaring that he knocked her out with three blue pills and then attacked her at his Philadelphia home in 2004.

Update 10.09pm: Bill Cosby's chief accuser has given evidence at his sexual assault retrial, declaring that he knocked her out with three blue pills and then attacked her at his Philadelphia home in 2004.

"I was weak. I was limp, and I just could not fight him off," said Andrea Constand, once again confronting the 80-year-old comedian in court after his first trial ended with a hung jury.