In 2006, Steven E. Jones, who became a leading advocate of the demolition theory, published the paper "Why Indeed Did the WTC Buildings Completely Collapse?". He was placed on paid leave by Brigham Young University following what they described as Jones's "increasingly speculative and accusatory" statements in September 2006, pending a review of his statements and research. Six weeks later, Jones retired from the university. Skepticism arose as to the scientific claims made by Jones and the efficacy of the peer-review process involved in the publication of his hypotheses, and conspiracy theorists responded to criticism by positing still more elaborate ostensible cover-ups.