McMillan is a cosmetic injector and nurse in Bozeman, who also worked as an actress on an episode of the Paramount Network show “Yellowstone.”

In September, Olympic bobsledder Aja Evans filed a lawsuit against Wilhelm, accusing him of sexually assaulting her during multiple treatment sessions that started in 2012.

Wilhelm founded Pro Chiropractic in 2015, which has locations in Bozeman in Belgrade.

McMillan’s lawsuit alleges that Wilhelm first contacted her through Facebook messages in late 2021 after finding her through a mutual acquaintance. She said she booked an appointment with Wilhelm in June 2022 to treat ongoing neck pain from her job. After she started seeing Wilhelm for treatment, she alleges the chiropractor’s message became more flirtatious, which she found “bizarre.”

In an interview with the Chronicle, McMillan said Wilhelm decided to do a “full body tune-up” during her first session instead of addressing her neck pain.

“When I was in for my first appointment with him, he yanked so aggressively on each of my legs — which I had never had low back pain or hip pain or anything like that, but it was so jarring that I almost felt like I was getting yanked off the table,” McMillan said in an interview. “And I think it was about a day later that I started experiencing excruciating and sharp shooting pain in my groin and vagina area.”

In following treatment sessions, McMillan said, Wilhelm allegedly treated the new injury by massaging the area around her vagina, which she described as “excruciating.”

“I remember going home after my initial appointment after the injury and telling my husband, ‘I was touched on my vagina today by the chiropractor for treating the injury he caused’,” McMillan said.

McMillan’s lawsuit alleges that Wilhelm deliberately injured her “to molest and abuse ...under the guise of medical treatment.” The injury she got from the first session gave her severe mobility issues, making it difficult to do things like shave her legs in the shower, McMillan said.

“I couldn’t play with my children,” McMillan said. “...I couldn’t be intimate with my husband anymore. You don’t really realize how often you open your legs to just move and get out of a vehicle as often as you do.”

She also alleged Wilhelm told her to undress down to her bra for a neck adjustment during one session, and did not give her a medical gown or explain why she needed to undress for the procedure. McMillan said she was expecting someone to enter the room to give her something to wear, but no one did.

“The bra incident was also enough, securing the notion that something is not right here, and ...really put a cap of shame on everything because I’m in a position of empowering women and being strong and having boundaries, and then feeling like I just didn’t stand up for myself,” she said.

The lawsuit also said McMillan was undergoing in vitro fertilization treatment at one point while seeing Wilhelm, and alleges her “eggs literally disintegrated” because of a session where he used a “magnet machine” to treat her pain.

McMillan initially trusted Wilhelm, she said.

“I’ve been a nurse for 14-ish years and I’ve worked as a nurse for forever, and you’re just very trusting of people, especially who are in the medical community,” McMillan said. “...I think most patients would agree, whether they’re going to see a chiropractor or gonna go see a foot doctor, that that’s not our expertise and we’re just trusting. Okay, you’re licensed, you’ve got a business, I should be able to trust you.”

After discontinuing her treatments with Wilhelm, McMillan went to a different physical therapist to treat the pain in her groin area. McMillan said the new provider did not touch her, instead demonstrating pelvic strength exercises to treat her pain.

Reading news coverage of Evans’ lawsuit against Wilhelm encouraged her to come forward too, McMillan said, adding that she hopes her case will have a similar effect for other survivors of sexual assault. Evans’ story is “eerily similar” to what she experienced, McMillan said.

“I hope this allows other women to come forward because I know there are other women who he’s done this to. The number one is that he doesn’t have access to take advantage of women to sexually abuse them and use his position to do that,” McMillan said.

On Monday, the Chronicle contacted Wilhelm’s offices and was told he was not working at the time.

After interview requests sent through Pro Chiropractic and his Bozeman-based lawyer, Ryan Jackson, Wilhelm provided the following statement to the Chronicle:

“I vehemently deny the allegations raised by Ms. McMillan,” Wilhelm wrote in an email. “These allegations are part and parcel of a larger smear campaign, motivated by greed, that have been initiated against me individually and my practice. I look forward to addressing these allegations head-on and I hope that when I am vindicated that those at the helm of this false narrative will exercise the same zest in clearing my name that they have employed in seeking to destroy it. I am grateful for my family, friends and members of the community who have continued to express their support.”

Flagstaff-based attorney Ryan Stevens, who represents Wilhelm in Evans’ lawsuit, was not available to provide a comment on McMillan’s lawsuit, a staff member in his office told the Chronicle.

Michelle Simpson Tuegel, who represents McMillan and Evans, said Evans’ lawsuit is still pending.

“The case is set for a status conference with the judge in New York in early February,” Tuegel said in an email. “The case does not yet have an initial trial setting yet as it is too early in the process, but initial deadlines should be set by the court in the next month or so and then the discovery process will continue in that case.”

Pro Chiropractic’s website previously listed Wilhelm as a “partner team physician” with Montana State University Athletics. The university denied any affiliation with Wilhelm, sending a cease-and-desist letter in September asking him to remove the reference to MSU on the website, which he did.

A spokesperson from MSU told the Chronicle in September that Wilhelm’s connection to the university was limited to a paid sponsorship, and they had no record of him treating MSU athletes.

Other local team affiliations have been removed from Wilhelm’s website. In September, the site listed Wilhelm as being involved with Manhattan High School athletics since 2012 and working with Manhattan Christian School from 2009 to 2013. The site also said Wilhelm worked with the Gallatin Roller Girlz, a local roller derby team, from 2012 to 2014.

All three teams have since been removed from the website.