Keppler and Theresa Kiel were involved in a business dispute when she was attacked, prosecutors told WNBC.
On the day of the attack, Theresa Kiel was inside the entrance corridor of her apartment when she was struck several times with the barbell, Newsday reported, citing a February news release from Nassau County District Attorney Madeline Singas.
Singas called the attack “barbaric,” the newspaper reported.
Marc Gann, Keppler’s attorney, said his client is innocent.
"There were quite a number of people who had motives to attack Theresa Kiel and it's our belief that one of those people is responsible for what happened to her, not Ralph Keppler," Gann told Newsday.