DALLAS — A former trainer who worked alongside imprisoned ex-sports doctor Larry Nassar at the famed Karolyi gymnastics ranch in Texas was charged Friday with sexual assault. But prosecutors said there wasn’t evidence of criminal wrongdoing by the couple who ran the facility, former national team coordinators Bela and Martha Karolyi.

A grand jury indicted former trainer Debra Van Horn on one count of second-degree sexual assault of a child, making her the first person other than Nassar to be charged in direct connection with his assaults.

Nassar — who is already serving decades in prison for sexual assault and possession of child pornography in Michigan — also was indicted Friday on six counts of the same charge.