(Los Angeles Times) The list of accusers alleging sexual assault by a Newport Beach surgeon has grown to more than a dozen, prosecutors said Friday.

More than 12 women and one man have claimed they were attacked by Dr. Grant Robicheaux, who has already been charged with drugging and raping two women, Orange County prosecutors said. One of the new allegations dates back two decades.

Several of the new accusers also alleged that the surgeon’s girlfriend, Cerissa Laura Riley, participated in the assaults, prosecutors said.

Robicheaux, 38, and Riley, 31, are facing charges of rape by drugs, oral copulation by anesthesia, assault with intent to commit sexual offenses and other crimes. They were arrested last week and released on $100,000 bail each.