(Sparta, WI) — A 30-year-old massage therapist in Sparta is facing a felony charge of sexual assault for the way he touched his female clients. If he is convicted, Ethan Karls could be sentenced to 40 years in prison. W-K-B-T/T-V reports that after a woman reported Karls to police two years ago, four more women came forward. His license was suspended in March but the charge against Karls wasn’t filed until four months later. Karls is free on bond until he is formally charged later this month.