“I feel it’s best to step aside,” Winfrey said in a statement Friday.
Afton Williamson says she faced harassment and discrimination on the ABC series.
The police department says it conducted a “thorough investigation.”
Singer was previously charged in February with 10 counts of aggravated criminal sexual abuse.
Television host maintains his innocence following accusations by multiple women.
Actor called out the comedian for “toxic behavior” in a series of tweets.
“I’m sorry, both for my poor judgment when I was young, and for not speaking out sooner.”
“You wouldn’t believe the worst without evidence, would you?” he asks.
Investigators claim Moonves was “evasive and untruthful.”
Cosby is currently serving a three to 10 year prison sentence for sexual assault.