Shawn Upshaw claims the troubled comic, who is accused of drugging and molesting a Canadian woman at his home in January 2004, once drugged a cocktail before bedding her at his home in Beverly Hills.
Upshaw tells tabloid National Enquirer, "He fixed me a drink that looked strange to me--there were several layers of color to it.
"I didn't want to drink it, but he kept telling me to finish it, and I did. I immediately felt very out of sorts. I knew definitely that I had been heavily drugged.
"Finally he took me to the bedroom and put me to bed. That's the last I remember of the night. I woke up in the morning knowing I'd had sex during my sleep."
Cosby's Canadian accuser has given a similar story to the authorities in her complaint, claiming she woke the morning after spending the night at the comedian's Philadelphia area home with her clothes in disarray.
Cosby's attorney John Schmitt, who has discredited the new claims against his client, insists the funnyman's ex-lover is also not to be believed.
He says, "These statements now by her are ridiculous. They're complete nonsense."
Police in Philadelphia have been interviewing Cosby about the claims against him.
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