In May 2017, Posobiec hired neo-Nazi brothers Jeffrey and Edward Clark to help create a documentary about the murder of Seth Rich for Rebel News. Jeffrey Clark was arrested by the FBI on gun charges after saying that the Jewish victims of the October 2018 Pittsburgh synagogue shooting "deserved exactly what happened to them and so much worse". Posobiec later said that he had never heard of Jeffrey Clark and had never made a documentary about Seth Rich, even though "HuffPost" published photographs of Posobiec and the Clarks working together. He left "Rebel News" after allegations were made that he had engaged in plagiarism.