Oakland County investigators are examining several new reports of alleged inappropriate sexual contact against a massage therapist who was charged last week with sexually assaulting a client during an appointment at a Rochester Hills spa, the Oakland County Sheriff's Office confirmed in an update released on Friday, November 6. Nathan Adam Thornsberry, 44, of North Branch, was charged on October 30 with one count of third-degree criminal sexual conduct. After his arrest became public, several additional people contacted authorities with their own allegations, and investigators say they believe there may be others who have not yet come forward. No additional charges have been announced. All of the allegations remain unproven, and Thornsberry is presumed innocent unless and until he is convicted in court.

Source: Lapeer County Tribune

The August allegation behind the charge

The charge stems from an appointment on August 12, 2026, at a spa in Rochester Hills, a suburb in Oakland County in Michigan's Metro Detroit area, where Thornsberry was working as a massage therapist. According to the Oakland County Prosecutor's Office, a woman receiving a massage alleged that Thornsberry touched her intimate areas and sexually penetrated her with his finger, and that when she told him to stop, he allegedly continued touching her as he withdrew his hand. The prosecutor's office has not publicly identified the spa, and no other client has been publicly identified.

Source: Oakland County Prosecutor's Office

Oakland County Prosecutor Karen D. McDonald announced the charge on October 30. “Massage and other therapeutic treatments are professional services. Customers have a right to expect to be treated professionally,” McDonald said. “This defendant allegedly abused his position of trust to violate the victim.” Thornsberry was arraigned the same day, October 30, according to the Lapeer County Tribune's reporting of the case.

What the sheriff's office said on November 6

The November 6 update is the new development in this case. The Sheriff's Office confirmed that investigators are actively examining several additional reports received after Thornsberry's arrest, from people alleging inappropriate sexual contact involving him. Authorities say the reports may involve his former workplace in Rochester Hills or other locations, and they have not disclosed how many additional people have contacted them. Sheriff Michael Bouchard said investigators are working to identify anyone who may have additional information.

Rochester Hills is one of Oakland County's largest suburbs, northwest of Detroit, and the Sheriff's Office provides police services there through its Rochester Hills Substation — the office now running the expanded inquiry. North Branch, where Thornsberry lives, is a village in Lapeer County, directly north of Oakland County, which is why the case is being followed closely by outlets in both counties.

The legal position, stated plainly

Third-degree criminal sexual conduct is a felony under Michigan law punishable by up to 15 years in prison. The prosecutor's office states the standard caution in its own release: “Charges are accusations and individuals are presumed innocent until and unless proven guilty.” That applies to the single count filed on October 30 and, with even greater force, to the newer reports described on November 6, which investigators are still examining and which have produced no new charges at this stage.

What happens next

Two tracks now run in parallel. In court, the October 30 case proceeds through Oakland County's criminal process on the single felony count, carrying a possible maximum of 15 years if Thornsberry is convicted. In the sheriff's substation, detectives will assess each new report — when and where the alleged contact happened, and whether it supports further charges, which would be a decision for Prosecutor McDonald's office. The Sheriff's Office has set no deadline for its appeal and has said the investigation remains ongoing; anyone who has not yet contacted investigators can still call the Rochester Hills Substation at 248-537-3530.