A New York man was convicted Monday of sexually assaulting a New Jersey teenager at an Atlantic County hotel after he extorted the minor using nude photographs the teen had sent to him, authorities said. Zachary Williams, 37, of New York, was found guilty of two counts of interstate travel to engage in illicit sexual conduct with a minor, production of and possession of child pornography, and coercion and enticement of a minor, according to a statement from the U.S. Attorney’s Office District of New Jersey. In September 2020, Williams met the 13-year-old via Snapchat and told the child he was …