An arrest warrant has been issued for entertainer Bill Cosby for allegedly drugging and sexually assaulting former Temple employee Andrea Constand at his Elkins Park, Pennsylvania mansion in January 2004, Montgomery County District Attorney-Elect Kevin Steele said at a Wednesday press conference.

Cosby is expected to be arraigned later this afternoon in Elkins Park, Pennsylvania.

Steele said that Constand "came to consider Mr. Cosby her mentor and her friend."

He said that Cosby "made two sexual advances at her that were rejected." He added, "Mr. Cosby urged her to take pills and to drink wine, the effect of which left her unable to [rebuff his advances]."

Prosecutor say the the release of a deposition last summer from a 2005 civil suit filed by Constand, in which Cosby admitted to giving quaaludes to women he wanted to have sex with, caused the District Attorney's office to reopen the case.

Constand was not available for comment but one of her attorneys expressed gratitude toward the prosecutor.

Cosby has previously said what happened between him and Constand was consensual, but in new court filings last summer Constand said she was in a relationship with a woman at the time. She also called Cosby a "narcissist" who missed cues that she's gay.

The statute of limitations to charge Cosby runs out in January.

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