ALISO VIEJO (CBSLA.com) — Authorities say a 72-year-old man is accused of sexually assaulting a woman who thought he was training her for a job in a medical spa.

The Orange County Sheriff’s Department said Ray Baker of Laguna Niguel was arrested last week and booked on suspicion of penetration with a foreign object and sexual battery.

Deputies said in a written statement that he has since posted $50,000 bail.

“He solicited people through Craigslist. He had them come to the business in Laguna Niguel and put them through what he considered a training session in preparation for the opening of the second shop,” Lt. Jeff Hallock of the Orange County Sheriff’s Department said.

“And during the training session, that’s when at some point he would sexually assault the victim utilizing this particular medical device,” Hallock said.

Sheriff’s investigators said the 29-year-old alleged victim told them Baker sexually assaulted her a number of times while he claimed he was training her on the use of a medical device.

The woman alleges that Baker tried to show 18 other women how the device worked but they apparently failed the training.

“It’s kind of hard to think that something like that was happening right next door,” said Carrie Rogers, who works at a mortgage company next door to the spa.

“I’d heard conversations because our walls are really thin and I’d heard him on the phone with other women saying, ‘You know, I’d like you to come work for me,’ ” Rogers, a neighbor, said.

Deputies said in a statement that Baker will be scheduled to appear in court pending the filing of charges by the Orange County District Attorney’s office.

Anyone with additional information about this case is asked to call Orange County Sheriff’s Department Special Victims Unit Sgt. Wade Walsvick at (714) 647-7418 or (714) 647-7000.