Lawyers are negotiating, but if found guilty in a trial, the health club could pay fines and damages up to $100,000.
Pettibone was found not guilty in a separate trial, after the defense declined to argue the case.
All three were found not guilty in a trial which one historian has described as "largely a piece of anti-Catholic propaganda".
If found guilty in a trial, the bishop could be censured or even deposed.
He was found not liable in a sordid trial, and two weeks afterward, the woman's husband committed suicide.
On 28 December, he was found guilty in a secret trial and sentenced to a 12-year jail term.
Dr. Sheppard was found not guilty in a second trial but died four years later.
Czolgosz was found guilty of murder in a very fast trial.
Robert Chaulk was subsequently found not guilty by reason of insanity in a new trial.
On September 5, 2001, he was found guilty in a secret trial, and sentenced to eight years' imprisonment.