McKell was arrested and booked into the Utah County jail on suspicion of felony object rape, forcible sodomy and four counts of sexual battery. He spent about 24 hours in jail before posting a $50,000 bond, jail records show.
No formal charges had been filed against McKell and a telephone message seeking details of the arrest from a Utah County Sheriff's Office spokesman was not immediately returned on Saturday.
Utah County Sheriff's Sgt. Spencer Cannon declined to provide specific details about the investigation that led to McKell's arrest. However, Cannon said the case had been reviewed by Utah County prosecutors on April 16 and the sheriff's office expects criminal charges could be filed against McKell in the coming days.
Cannon said McKell surrendered voluntarily to authorities at the jail after he was contacted by police and prosecutors.
Sheriff's office policy does not allow probable cause statements filed with the jail by investigators to support McKell's arrest to be released except by the court, a jail booking officer said.
McKell is married to NuSkin co-founder Nedra Roney McKell previously Nedra Roney Tischner who founded the international company with her brother, Blake Roney. In 1996, she was charged with multiple counts of prescription fraud and a single count of insurance fraud. In exchange for a guilty plea in abeyance, she was sentenced to three years probation, after which the charges were dismissed. Nedra Roney McKell has not worked for NuSkin since since the late 1980s and is no longer a major shareholder in the company, NuSkin's Corporate Communications Director Kara Schneck said.
Court records show Robert Clark McKell's arrest came nine days after a woman filed a petition for a protective order against him in Provo's 4th District Court.
A judge denied the petition because it was not signed by the applicant.